Category Archives: Uncategorized

Avian Influenza Is Back

As you may have noticed through the news lately, Avian Influenza has been found in North America again.  Tennessee, Alabama, and most recently Georgia have had isolations of Avian Influenza.  In Ontario, the Ontario Animal Health Network is a group of veterinarians who work together to coordinate animal health strategies in Ontario.  We have produced a podcast where Dr. Tom Baker, the director of the Feather Board Command Centre, an industry group that takes charge of disease outbreaks if they occur in Ontario.  The podcast covers information that should be of interest to small flock keepers.  There is a huge amount of expertise in the 20 minute interview that follows.  I hope you find it valuable.

Mike the Chicken Vet



Euthanasia for Backyard Birds

This is a post I have been wanting to write for a long time, but hesitant to take on.  I have done A LOT of work with the professional poultry producers in the past couple years, teaching the best euthanasia techniques and procedures.  It is possibly the biggest contribution I will make in my career to animal welfare.  I believe that it is part of the responsibility of any animal owner to reduce the suffering of any animal in their care, and euthanasia is an important part of that.  I have also been asked by many of you in my comment section for advice, and have seen a LOT of questionable things floating around on the internet.

One thing I will never do is tell an owner WHEN it is appropriate to euthanize.  You need to make that decision based on your values, ethics and experience.  I have my opinion of whether it is humane to try to set a broken leg on a chicken and try to get her to recover.  You have your opinion.  Both of our opinions are based on how we compute pain endured vs the value of extending a life.  As long as we both consider the situation, and make the decision based on the welfare of the animal, we are both right.  Of course, we are both wrong as well.  Nobody, regardless of experience, ever euthanizes at the perfect time….we do our best and have to live with the decisions.

Euthanasia definitely does not have to be a “do it yourself” process.  Veterinarians will euthanize birds in most cases….often they do not feel comfortable diagnosing or treating, but will still perform this important service.  If the cost, distance or circumstances preclude you using a vets’ services, I would far rather see you do the job properly yourself, than botch something as important and emotional as this.

Now, some general information about euthanasia.  I consider these facts, and have spent a lot of time and study convincing myself of these truths:

  1. Euthanasia is an effective tool in improving the welfare of an individual or group of animals
  2. Euthanasia is more often performed too late, rather than too early.  More birds suffer needlessly because their keepers aren’t willing to perform the job than suffer a needless early death.
  3. Euthanasia is NOT about making a bird dead.  The crucial part is making the bird unconscious quickly.  I can soak a bird in kerosene, and light it on fire… will ALWAYS end up dead, but this is NOT euthanasia.  Once a bird cannot feel pain or fear, the method used to kill the body is almost irrelevant, for the bird’s welfare.
  4. The “appetizing” factor in any method of euthanasia is not relevant to the bird’s welfare.  If the bird bleeds, or goes through convulsions, or the act looks violent, the method may still be very humane.  The “yuck” factor is an important component of the effect on the “doer”, and this is something to take into consideration, but doesn’t necessarily affect the well-being of the bird.
  5. Treating an animal with respect will always result in better welfare for both the animal and yourself.  If you are doing the best technique you can, and making decisions based on what is best for the bird, you can feel good about what you do.

With these truths in mind, I am going to describe two methods of euthanasia for backyard poultry keepers to consider.  They should be appropriate for the vast majority of people who raise chickens on a small scale.  I will describe them in gory detail, and will tell you HOW they work, and why they are humane.  There are other methods that are humane….I have chosen the most accessible methods that I think will be most useful for small flock owners.  If you are squeamish, you may want to stop reading now.

Cervical Dislocation

Cervical dislocation  is humane, if done properly.  The benefits of this method is that it can be done immediately after identifying that a bird should be euthanized, and needs no tools.  It causes unconsciousness in around 40 seconds after being applied, and is very repeatable….that is, it works every time it is done properly.  The way cervical dislocation causes unconsciousness is by stretching the neck, dislocating the joint at the base of the skull.  This causes the spinal cord (which is very elastic) to snap, and the resulting recoil causes brain damage and unconsciousness through concussion.  It causes death by breaking the blood vessels (carotid arteries and jugular veins) so that the brain runs out of oxygen.

Cervical dislocation is NOT effective if the dislocation occurs far down the neck (figure 2), if the neck isn’t stretched lengthwise (“breaking the neck” doesn’t make the bird unconscious….it will die, after several minutes), or if bones are crushed in the process. Spinning the bird (referred to sometimes as the “helicopter” method) is unacceptable, and the “broomstick” method is questionable, depending on technique….if you put too much weight on the broomstick, or stand on it too long, you are causing unnecessary pain and discomfort.  The technique that works best, and is recommended by veterinarians and welfare associations is as follows:

  • Hold the bird by the legs, tight to your bodyposition
  • Grasp the bird by the head, either between the two fingers of the dominant hand, or by the thumb and first finger around the neck

hold1                 hold2

  • Tilt the birds head well back, so it points towards the tail of the bird (this position aligns the joints so that it is much easier to dislocate the head from the neck)
  • Firmly push the head away from your body until you feel the head separate (you will definitely feel the joint let go)
  • Pinch just behind the head to ensure that the head has separated from the neck.  You will feel a definite gap, and it will feel like there are 2 layers of skin between your fingers.


  • The bird will convulse and go into spasms….this is normal, and results from the loss of central control over the muscles.  The movements do NOT mean the bird is conscious or suffering.
  • Always ensure that the euthanasia has been effective by monitoring the bird until after convulsions stop and you can observe lack of breathing and that you cannot hear a heartbeat, either by listening to the chest with a stethoscope (if you have one), or by placing your ear against the birds chest.


Decapitation is an effective, humane method of dispatching a suffering animal.  It is NOT instantaneous, but very quick, with unconsciousness usually occurring within 15-20 seconds.  Unconsciousness occurs when the head is removed, and the Cerebral Spinal Fluid (CSF) escapes from the cut spinal cord.  CSF is a fluid that acts to keep the brain and spinal cord “floating” inside the skull and spine… letting this escape, the brain will come in contact with the skull, causing concussion and unconsciousness.  Obviously, death will follow because of loss of blood flow to the brain.  An important factor in this method is that the head MUST be completely removed.  Cutting the major vessels and bleeding the bird out is not humane.  Yes….the backyard slaughter method used by many small flock owners is NOT acceptable.  If you cut all the blood vessels in the neck, the bird will stay conscious until the oxygen in the brain runs out…..3-4 minutes later.  It is called exsanguination (or “bleeding”), and is identified as an UNACCEPTABLE method of killing a bird by the AVMA (American Veterinary Medical Association).  If you want to bleed a bird (ie for slaughter), you must make it unconscious first.

Other things to consider when euthanizing via decapitation, are that the blades used must be sharp, and the head must be removed in one cut.  The blade, or the scissors must be large enough that one motion completely removes the head.  Scissors are helpful as they improve human safety.  Axes and knives work very well, but you must be careful!  A stump with 2 nails driven in about an inch apart is a good way to hold the head safely, and cutting cones are very helpful to hold the bird still and keep your fingers away from the blade.

cutting-cone3              cleaver

There are other humane methods that can be used, but for various reasons, I don’t think are valuable to describe here.  Blunt force trauma is very difficult to do properly, and emotionally disturbing for the person delivering the blow…..the odds of mis-hitting among people who rarely do it are too high for me to recommend it to you.  But, in the hands of an experienced, effective operator, this method is extremely humane, despite the violence of the act.  Carbon Dioxide gas, captive bolt devices, Low Atmospheric stunning, and electrocution are all humane, and you may hear of them, but need far too much equipment, are often too dangerous and need a lot of training to be done right.  Any of these methods, done incorrectly, are inhumane.

Remember….euthanasia is not about making the bird die….it is about how they get there.  I’ve heard of backyard poultry people drowning birds, poisoning them, freezing them and other methods that are NOT humane.  I choose to believe that they didn’t know of better methods, and hope this article helps.

One last point.  Consider what your bird is going through as you are deciding when to euthanize.  Remember that chickens hide pain, even severe pain, very well.  It’s important to realize that it takes a LOT of discomfort for a bird to stop eating and act sick….hunched up in a corner of a coop.  Very often, I feel that more suffering is caused by waiting too long to euthanize than even by people who euthanize incorrectly.  It is part of your responsibility as an owner to care for your birds, and if her situation is painful and seems hopeless, it is time to start seriously considering euthanasia.

Mike the Chicken Vet



I’m Back!

Hi Everyone;

I have been away for too long.  I apologize, but have a good excuse…..well, several excuses, actually.  I accidentally overbooked myself into several projects to do with animal welfare, backyard chickens, advances in commercial egg production, and all the personal stuff that comes from having 2 kids that keep all the rest of the projects in perspective.

I think these past couple years have given me new perspectives on the poultry world that hopefully will make my blog posts a little more insightful.  Many of my projects have been at the national level and have made me think about bigger issues in bigger ways.  Conversely, I have done some projects that involve backyard flocks, which makes me think about smaller issues, in smaller ways…..equally challenging, surprisingly!

The things that sidetracked me from writing here over the past year or so have included being a member of the National Farm Animal Care Council committee to develop that Code of Practice for Poultry (Layers).  This document is basically a set of rules that define what is considered humane treatment for egg laying chickens in Canada.  It is a national standard, that is going to be implemented across the country.  As you can imagine, this was a VERY complicated process, and involved finding a middle ground that retailers, researchers, vets, humane societies and producers could all agree on…..I think we should take on the Palistine situation next….it couldn’t be a lot more complicated.  The code we produced, which will be published this March, is one that I am very proud to be a part of….it truly improves the welfare of millions of chickens, while still being practical.  I will tell you more about the process in a later post.

I have been very involved in developing and delivering a euthanasia course to all the laying hen producers in Ontario (yes, every one), and to a large percentage of the producers across the country.  Euthanasia has been one of those subjects that everyone wonders about but people don’t want to talk about openly (kinda like that funny looking nephew at the family reunion…..admit it…).  All producers, from the small backyard keeper to the largest professional farm need to have a plan in place to deal with an injured or sick chicken.  The decisions around when and how to euthanize are personal, emotional, and difficult, no matter what the size of your operation.  It is a subject that has been poorly communicated historically, and the course we made and delivered has been really successful and well received by the producers that attended.  I hope to explain practical methods of euthanizing to this audience as well.  I hope that you can understand the process, if it is valuable to you, or at least understand what chicken farmers face when they have to deal with euthanasia.

I have been involved with teaching how-to courses to backyard chicken keepers near me in Ontario, and being part of developing a course for non-poultry vets to give them the basics of chicken medicine so that they can be of service to backyard producers or small flock farmers in their area.  It was fun to explain some of what I do to some old colleagues, and it is definitely valuable to get some more vets out there that are willing and able to service small flocks.

I was also involved in developing a hatchery welfare program that is being implemented in the hatcheries across the country.  Again, the hatcheries have somewhat “fallen through the cracks” with respect to programs.  Don’t get me wrong, the welfare of the birds is very important in our hatcheries, but now we have a program that ensures that we are all measuring welfare in the same way, and trying to improve our processes as a group.  There are several new technologies and processes that are improving the welfare of all chicks in the first day of life.  I am continuing to work on these issues, and will share these advances in the next little while in the blog.

Finally, I have been very involved in the health of the laying hens in Ontario.  This means that I was busy helping to recover from Avian Influenza over the past year.  Understanding how the disease is spread, and the things that a country has to do to regain the status of being “free from Avian Influenza”, and the importance of that distinction gave me a new understanding of this devastating disease and the repercussions.

So, in summary….I am back….I have missed writing this blog, and am very glad to have the time to get back to it.  I hope there are still those of you that are interested in what I have to say, and I hope that I can share some things that are of value to you.

Thanks for reading,

Mike the Chicken Vet.





Avian Influenza Hits Ontario

It has happened.  The event that poultry vets, suppliers, farmers and supporting industries have been preparing for and dreading for years….Avian Influenza has been isolated in Ontario.  As you can imagine, this is a very busy time for those of us in the industry, putting in control measures, routing deliveries, sampling to identify any other flocks, and implementing our emergency procedures.  We are working closely (and surprisingly well) with govornments at the provincial and national levels to minimize the impact and the number of birds affected.  This virus is also a risk for backyard and hobby farmers as well.  Ironically, we had produced an information sheet on Avian Influenza for small flocks because of the prevalence in the US, and concerns it might come here…..well….here it is…OAHN poultry small flock PRODUCER REPORT avian flu FINAL

This is an information sheet with some useful stuff for small flocks.  It will be valuable for anyone in any area where avian influenza is present.  Our group will also be developing a webinar for small flocks in the next little while, to help you develop a strategy to keep your birds safe.  Feel free to share this with anyone who might find it useful.  I will try to keep you updated as I can on things that may be useful to you.

If only they'd keep the darn things ON!

Mike the Chicken Vet

What do you put in those chickens?

There is NO WAY he's all natural!
There is NO WAY he’s all natural!

If I had a quarter for every time I was asked what we put into laying hens to make them lay so many eggs….I would NOT be setting my alarm early so I could shovel my driveway out for the 4th time this week.  I can’t keep track of the number of times or ways I have been told about the constant flow of antibiotics, hormones and additives that go into laying hens.  It has stopped being a surprise, but it used to be….I always wondered what I was doing wrong as a vet!  If everyone else was using all these good drugs on their hens, what was I missing?  Then I figured it out….what I was missing was immersion in the internet.   The amount of misinformation out there is staggering.  I’m sure it’s true when I do a quick search on nuclear energy, or free trade coffee, or Beyoncé’s plastic surgery history (not that I would….honest).

The difference is, in this case, I KNOW how much is misinformation….on other subjects, I can be convinced by a smooth argument and repetition.

I can only swear to the truth about the birds I look after, here in Ontario.  As the vet on record for over half of the laying hens in Ontario, I can state that it is much more common for flocks to NEVER see antibiotics than to be treated.  I use antibiotics if a flock needs them to fight off a disease, but that is rare….I used antibiotics less than 20 times last year in the more than 300 flocks I am in charge of.

Professional laying hen farmers spend a lot of time, effort and money in PREVENTION of disease.  This includes extensive vaccine programs, strict biosecurity programs, excellent control of the environment the hens are in, clean barns, high quality feed and water, and protection from wild animals (this is especially important right now, when waterfowl are shedding Avian Influenza in many areas of North America).

If only they'd keep the darn things ON!

If only they’d keep the darn things ON!

That and the fact that laying hens are mostly in cages, separated from their manure, means that it is uncommon for laying hens to get diseases that require treatment with antibiotics.

I think it is crucial for animal welfare to allow for the treatment of sick flocks when medically necessary.  I also think it is crucial for farmers to take disease prevention and prudent use of antibiotics very seriously…..and, in my experience, they do.  We manage flocks so we don’t have to treat, but will treat if it becomes necessary.

I still wondered if I was running a different practice than my colleagues though.  I know the vast majority of the laying hen vets in North America, but they don’t tell me what they are doing on a day-to-day basis.  I was in an international poultry expo in Atlanta last month….a who’s-who of the poultry world, and about 30 of us laying hen vets got together for a meeting (we are not a big group….there are more pro sports TEAMS in the US than laying hen vets).  The subject of antibiotic resistance came up, as it does in every vet meeting I’ve attended in the past 5 years.  One of the most distinguished vets in our group said he thought our industry was doing well in antibiotic usage….his quote: “I belong to a group called AA….Antibiotic Anonymous…..whenever I feel the urge to try to solve a problem with antibiotics, I phone another vet, and they talk me out of it”.   That made me feel that we were all pushing in the same direction.

As for hormones, the last time I saw commercial laying hens administered hormones, they were given by a unicorn, and brought onto the farm by one of the giant alligators from the sewers.  It’s an urban myth and, in reality:

It. Doesn’t. Happen.  ………     Ever.   If I could say it more clearly, I would.  There is no hormone product for sale for poultry, there is not a farmer who would want it, there is no way it would make economic sense, and there is absolutely no reason to use such a product.  Our hens have been genetically selected so well that they almost lay an egg every day….that is all they can produce!  There would be no way to feed a hen enough nutrients to allow her to produce more than that!  Besides…many of you readers have backyard hens, who also lay close to an egg a day…..where are you getting your hormone supplements from?


Additives: Not nearly as ominous as “investigative reporters” would have you believe

As for all the additives we use in laying hen feed, there is some truth to that.  We add vitamins, lutein, Omega 3 fatty acids and other nutrient enrichments that are passed on to the people who eat the eggs.  We also add things to improve the health of the birds….electrolytes (think Gatorade, without the sugar), calcium for bone strength, probiotics (similar to yogurt, but not as gross), and organic acids (similar to vinegar), to help with digestion and keep the gut healthy (actually this is one of the more recent focuses of disease prevention…..gut health).

I hope this makes some sense to readers who are unfamiliar with professional egg production….at first glance, it might make sense for us to use a lot of drugs or even hormones.  But once you look a little deeper, disease prevention and good management do more good than either of those strategies.

Mike the Chicken Vet

Avian Influenza Again

Some of you might be aware that there is another outbreak of Avian Influenza in Canada. In British Columbia, on our west coast, a total of 10 barns have been found to be infected (so far). I’m getting quite a few calls asking about information around the disease, so I thought I would share some thoughts with you, in case you are interested.

Avian Influenza (AI) is a virus that is pretty well adapted to ducks and geese. The bug lives in fairly good harmony with waterfowl, not causing too much disease or problems. Then….it gets into chickens (or turkeys). AI gets into cells in the windpipes and lungs, making the birds sick….but not too sick. The virus hijacks the birds cells to make copies of itself, and then destroys the cell, and spread the new viruses into the world. This is what we refer to as “Low pathogenic” AI. Chickens and turkeys don’t feel well, but the severity is a lot like a cold for us…farmers would notice the flock was off, but no alarm bells.

Then….a couple subtle changes happen in the virus, and the bug becomes able to penetrate cells in the windpipes and lungs, but also the intestines, muscles and some other organs. The virus makes many more copies of itself each time it invades a cell, and it invades A LOT more cells. As you can imagine, the amount of virus produced is staggering, and the number of cells damaged by the virus are very high. The virus now has become “Highly pathogenic”. It makes birds desperately ill or dead extremely quickly. So quickly, in fact, that they don’t even seem to be sick….you can check the birds in the barn at 9 am, and notice nothing….come back at noon, and hundreds of birds are dead… the vet, who gets there at 3pm, and thousands of birds have died….it’s that fast and that severe. In the current outbreak, over half the turkeys in one flock had died within a day and a half from when they first got sick.

The other aspect of AI is that it is so transmissible that it sometimes seems like magic. It rides the wind, lives in water, can attach itself to clothes, tires, shovels, manure spreaders…..anything. In one outbreak I was involved with in the 90s, a backhoe was used to dig the hole to bury an affected flock for disposal. The backhoe was washed, and trailered 30 miles back to the owner’s lot. It was parked about 200 yards upwind from another barn, and that barn got infected. Controlling this disease is extremely difficult, and trying not to spread the virus while trying to stop the outbreak is tricky.

There are a small army of really smart people doing heroic amounts of work, trying to stop the spread of this disease. Birds can’t move without a permit showing that the flock has tested negative. Feed is delivered in very precise way, in a determined schedule. Affected flocks are quarantined, and euthanized, and any flock within the safety zone (usually 1-3km around the affected flock) is immediately tested. I am REALLY glad I’m not involved in the clean up, and commend all the farmers, vets, government officials and all the other people involved in the clean up.

You might ask what the human risk is. The risk for human infection is extremely low. Very, very few Influenza viruses can transfer from birds to mammals, let alone people. Also, the only risk to people at all, is through contact with infected live birds, or their environment. If you are not exposed to sick birds, or involved in the clean-up, you cannot get influenza from eggs, chicken meat, or any chicken product. I have no more fear of a human pandemic from this outbreak than I fear California falling into the ocean because of a massive earthquake…..both are imaginable, but vanishingly unlikely.

I hope this helps answer any questions you might have had, and if you would like to know something else, please ask.

Mike the Chicken Vet

Euthanasia Part 1

This is a post I have been mulling around for a while. Euthanasia is a very emotional, controversial, and uncomfortable subject, especially when talking to people with different backgrounds. I have been lucky enough to be involved in a big animal welfare project that is going to focus on agricultural animal welfare….all species. The strategy sessions have one issue in common between cows, pigs, chickens, turkeys, rabbits……euthanasia. Farmers know that one of the most important welfare contributions they can make to their animals is to properly and humanely dispatch sick, injured or unthrifty animals.
I also remember a conversation with a very invested backyard chicken keeper, and her main concern with the lack of accessible vet care for urban chickens was having no-one who could euthanize her hens, or teach her how to do it herself, if it came to it. Euthanasia is a huge animal welfare concern for anyone who lives with any type of animal.
There are two huge questions surrounding euthanasia….when and how. When to euthanize is an emotionally charged, non-scientific, opinion and value based question that will be different for each person. It depends on your opinion on quality of life, and your morality surrounding death. I am NOT going to tell you when you should make the decision that euthanasia is appropriate. I will state that refusing to euthanize an animal no matter the circumstances, is detrimental to animal welfare. Letting an animal languish and waste up to the time when he dies, instead of euthanizing him, increasing the amount that animal suffers. Having said that, the decisions around whether an animal with a specific injury, or a disease at a certain point should be euthanized is a value based question, and needs to be made on an individual basis.

Something I can probably help with is the HOW of euthanasia. Killing an animal and euthanizing an animal are not the same thing….in both cases, the animal ends up dead, but euthanasia has more requirements than the final result. Medically, euthanasia is defined as “the practice of intentionally ending a life in order to relieve pain and suffering“. Other definitions usually include the concept of “painless death“. In reality, true euthanasia is virtually impossible. You are taking a living body and damaging it somehow so that it stops living. You can use poisons, trauma, or take away something the body needs to live. It is our jobs, as welfare proponents, vets and caring owners, to get as close to perfect as we can.

There are 3 aspects of proper euthanasia.  1 – It should cause immediate insensibility (unconsciousness), 2 – It should be irreversible, and 3 – It should cause no discomfort (pain or fear). The issue arises with the absolute statements of immediate and NO discomfort. There is a second, separate, and unfortunately pervasive issue – esthetics. At the end of the day, we are taking a life. It will ALWAYS be distasteful and uncomfortable. It will sometimes be gross. The people it affects most? The people doing it. That is why many “investigative” videos show problems with farm worker’s attitudes around euthanasia….the joking, callousness or disinterest captured on camera are almost always defence mechanisms of people trying to get through a part of their jobs that make them very uncomfortable. It doesn’t excuse the behaviour, but it does explain it a bit. Euthanasia methods need to be accommodating for the persons executing it.

A real, and possibly the most damaging aspect of euthanasia (and the main reason I wanted to write this convoluted post), is the attitude of people watching the euthanasia…..especially the public, who are definitely going to ask agriculture to justify the methods we use to dispatch animals. If you consider the 3 aspects of proper euthanasia, the most effective methods of euthanasia for farm animals are gunshot, blunt force trauma, decapitation and maceration (of appropriately small animals). All of these methods are summarily condemned by people who are only used to dealing with companion animals. Why? Obviously, it is disturbing, violent, and gross. I get that.

But, think about it from the animals point of view.  Imagine a piglet, picked up and held, squealing and afraid, while someone holds him very firmly until a vein is found, inserts a needle, and puts him down.  It maybe takes a minute, and hurts only a little, but the fear level is pretty high.  He then goes into the corner, lies down, goes to sleep and doesn’t wake up.  Now imagine the same piglet, held for about 5 seconds, and struck with a hammer.  He is instantaneously killed, and there is minimal to no fear.

Which is more humane to the animal?  How would you feel if you saw someone euthanize a piglet with a hammer?  Would you be upset at the farmer?  Would you charge him with cruelty?  (NOTE: I am not recommending using a hammer as a proper method of euthanasia….there is too much of a risk of missing, and causing welfare problems….it is simply a thought experiment).

People who work consistently with animals know that euthanasia is an important part of animal care, and realize that euthanasia is about the animal, not the observer


Winter is ending….Uh Oh!!

This winter has been a throwback to olden days (olden days is when I was a kid, according to my 7 year old). We had extended periods of cold, REAL snow (I got to expose my kids to the joys of digging tunnels in snowbanks for the first time in their lives), and all the bliss that goes with a real Canadian winter. I’m no social media guru, but I’ve noticed a lot of people from a lot of places complaining about the same thing across North America.
Your chickens have noticed it too. Trust me. They have been cooped up (pardon the pun), struggled through the snow, fought with frozen water, and risked frostbite for the past 4-5 months. They have likely slowed down in egg production, moved around less and eaten and drank less than they have in past winters. I salute all the backyard farmers who have helped their flocks get through the challenges.
But….as much as everyone involved is looking forward to a change in season, now is a very risky time for your flock. Here are some things to watch out for:

Your coop and run are likely deeper than you’d like them to be. Removing manure and litter in the winter is difficult, and a build up of litter is beneficial in keeping the coop warmer in the cold of winter. However….depending on the lay of the land, the drainage of your backyard, and your snow burden, there is a real risk of “poop soup” developing. If water can settle into your coop or run, either because of the slope of your yard, or the way snow is piled around it, the risk of disease is very significant. When manure is frozen and dry, it is not as much of a risk factor for disease…..cocci oocysts (eggs) are inert, E.coli and Salmonellas aren’t dividing and increasing in numbers, and worm eggs and fungi are less infective. Once you add water to the system, all this changes.

There is also a physical risk for your chickens from wet environments….wet feet have less integrity, and the risk of bumblefoot and ulcers goes up.


Spring is a tricky time for temperature. Damp air at 5C(42F) is more dangerous for frostbite than dry air below freezing. As the temperature goes up, and your yard gets muddier, your hens will (like your kids), run around, make a mess, and cover themselves in all kinds of goo. When they go back into the coop, the hens may be wet, which will increase humidity in the coop, and when temperature drops at night, there is a real risk of discomfort and even frostbite in your flock.


Clean out your coop……yesterday, if not sooner. Pick up the droppings in your run, as best you can. Reduce the source of infection, and you will go a long way to protecting your flock. Ideally, you would move both the coop and run to a fresh area of the yard as soon as the grass shows up.

Get out your shovel

Dig a moat around your coop, or dig a trench to guide the meltwater and runoff away from your hens and where they live. BUT, it is usually not a great idea to flood out your neighbour with meltwater, especially if the water is also draining from your coop. I can’t really help you specifically, since everyone’s situation is unique, but do your best to keep the water and mud away from your hens, without sacrificing neighbour relations.

Ventilate your Coop

Do what you can to keep the coop dry. Dryness is even more important than absolute temperature for hen comfort (within limits). A small, battery powered fan can make a world of difference. The other important aspect is keeping the floor dry, as this helps control bacterial load, improves foot health, and reduces humidity overnight. Clean out more often in spring….even though it is less convenient…..your hens will thank you for it.

Remember…..not only are environmental challenges higher in the spring, but your hens are quite likely coming back into production, which is also stressful and reduces their ability to fight off problems. Take the time to give them all the support you can to get through this tricky time.

Mike the Chicken Vet

Activists, Politics and Farming…Everyone Loses


Example of a Furnished Cage

The battle over animal welfare is coming to a head in the US.  California’s Proposition 2 comes into effect in January 2015, which is almost immediately, in terms of the farms affected.  The story is complicated, the issues are multi-layered, and as far as I can tell, NOBODY is going to win.


A Modern Conventional Cage Barn

Turn the clock back to the halcyon days of 2008.  An animal rights group called the Humane Society of the United States (HSUS) champions a ballot initiative in one of the most liberal states in America.  HSUS is an organization that is dedicated to the reduction and elimination of animal use in the world.  They had a budget of $125,763,492 in 2012, but used less than 1% of their funds for shelters.  They claim to want to improve the lives of laying hens and other farmed animals in California….cynics say they are trying to destroy the egg and pork industries.

Proposition 2 stated that “calves raised for veal, egg-laying hens and pregnant pigs be confined only in ways that allow these animals to lie down, stand up, fully extend their limbs and turn around freely.”  It passed with 63% of the vote.  Californians, although reportedly being confused about the implications of the statement, clearly want improved welfare for farmed animals. They also eat almost 9 Billion eggs per year.   After much legal wrangling, it has been decided that furnished cages (cages with a nest box, perches, scratch areas and more space) are an acceptable method of farming hens, as are free-range, free-run and aviaries…..all of which are noticeably more expensive than eggs from hens housed in cages.  Proposition 2 has an implementation date of Jan 1, 2015.

Farmers want to look after animals, produce food and make a living.  Several farmers decided to adopt new technologies and improve the welfare of hens.  Notably JS West Co. has converted several barns to furnished cages at an incredible cost.  They tried to recoup their investment by selling the eggs for a small premium.  Unfortunately, nobody would buy the eggs, and JS West has been forced to sell the eggs as traditional white eggs, at a loss.

Enter the Governator.  Arnold knew that, if the eggs produced in California had to be more expensive, they could not compete with cheaper eggs from Iowa, which has almost 52 million laying hens, well over 90% of which live in cages.  He proposed a law that would require that any egg sold in California would have to be produced by hens held to the new standards required by Prop 2.  Unfortunately, this law seems to be unconstitutional, since agricultural standard in one state cannot be dictated by another state’s rules.  The Governor-General of Missouri is suing California to allow access to California’s egg market, and it looks like he will likely prevail.

So…..where does that leave them?

At the end of the day, rules are rules, and California farmers will have to follow the housing regulations.  California will have to allow free trade of eggs from other states.  The end results will be millions or billions of dollars spent in court (depends who you ask), eggs produced in California will be more expensive to produce, and unless something drastic happens, all but 5-6% of Californians will buy the cheapest eggs in the store.

HSUS will not achieve either of their purported goals….egg consumption will not drop due to higher prices (which is supposed by critics to have been their actual end-game), and the same proportion of California egg consumption will be from caged hens (meaning no improvement of welfare, which is their official goal).

Californians will not get improved animal welfare, since they will continue to buy eggs as they always have….more than 90% of the eggs from hens in cages.

Farmers in California will basically go out of business.  If you are producing a commodity that is purchased on price, and your production costs are higher, you must make less profit.  Eventually, they will go elsewhere.

Hens will not have an improved life.  Actually…just from the fact that they will live in Ohio instead of California, it is arguable that their quality of life will go down……not many people take holidays in Ohio….

This is a case of the left hand not knowing what the right hand is doing, and nothing getting accomplished.  Except this is more like an octopus, and all the balls dropped are Faberge eggs worth millions.

Here in Canada, we are trying to use a collaborative process to develop a strategy for welfare improvement through the National Farm Animal Care Council.  We have farmers, vets, industry, welfare scientists, humane societies, retail councils and all other players in  egg supply sitting around the table hammering out a policy.  It is excruciatingly slow, but I think it is going to result in some improvement in welfare in Canadian egg production….rather than just a redistribution of the geography of egg production.

Mike the Chicken Vet

Welfare Impacts of Different Laying Hen Housing

Many people have read and commented on my previous post, where I tried to give some context to an animal activist video that attacked professional egg farmers in Canada. I have had numerous questions regarding housing types, and how “Welfare Friendly” they are. I am convinced that it would be easier to tell you how the colour purple smells. Anyways, here is a VERY BRIEF and superficial description of the welfare impacts of housing. These facts are based on scientific evaluations by some of the leading welfare scientists in the world. If you are “sciency”, I have included references at the bottom of the post, so I don’t get accused of making things up.

First, it is important to realize that animal welfare is generally evaluated under 3 sets of schemes.

1) Biological functioning measures an animal’s response to its environment. Mortality rates, production measures, corticosteroid levels, and any other measurable parameter will fall under this scheme. Welfare is assessed by the ability of the animal to adapt to its environment, and if it can adapt successfully, the welfare is felt to be good. For example, if you have a hen in a barn with a temperature of 15 degrees C, and her cortisol levels are normal, she is not ill, etc, etc, then you would say she is able to adapt to that environment, and her welfare is good. If she is in a 5 degree C barn, and her stress hormones are high, her body temperature is below normal, etc, you would say she cannot adapt to that temperature, and her welfare is poorer.

2) Affective state refers to the feelings of the animal. It is the feeling of hunger that is the problem, not the fact that the animal is hungry. Fear, frustration and boredom are important considerations in this approach, regardless of the physical state the animal is in. One caution with this approach is that affective states are extremely difficult to measure directly. Affective states can only be inferred from the actions the animal takes. For example, a shivering dog may be said to be cold, but she may actually be nervous, or excited.

3) Natural Living. The premise of this approach is that behavior evolves in a method similar to physical characteristics, and that extraneous behaviours will be phased out because they are too costly for the animal to maintain, if it is not important to the survival of the animal. Thus, any behavior, drive or urge that remains must be important to the animal, and for good welfare, the opportunity to perform all natural behaviours is necessary.

The welfare effects of different housing systems for laying hens are complicated and multi-layered. Conventional cages are heavily criticized because they severely restrict behavior and movement. They do provide many welfare advantages as well.

Typical modern conventional cage

Typical modern conventional cage

Cages provide excellent health and environmental benefits for the hen. They also effectively control group size, resulting in less inter-bird aggression and cannibalism. Health advantages provided by cages include less viral and bacterial infections, less parasite infestations, less bumblefoot, lower mortality and less antibiotic usage than loose housed or aviary flocks. Hens in cages also have less competition for feed and water. Environmental benefits delivered by cage systems include the lowest ammonia and respirable dust levels. On the downside, cages predispose hens to metabolic imbalances such as osteoporosis and fatty liver. Osteoporosis increases the risk of fractures during handling at depopulation. It is assumed that fear and boredom are inevitable consequences of barren environments, and natural living is very poorly provided.

Furnished cages are larger cages that contain perches, nest boxes and a scratch pad that has substrate on it to encourage

A Furnished Cage in Ontario

A Furnished Cage in Ontario

dust bathing. Mortality rates and bone strength are improved over conventional cages, and this housing system results in the least fractures overall. Infection rates, aggression and cannibalism are the same as conventional cages. Foot infections are more prevalent in furnished cages than conventional cages. Affective states in furnished cages are improved over conventional cages because of the variety of activities and social interactions that hens can perform, reducing boredom. Natural living aspects are improved due to the ability to perch, dustbathe and lay eggs in a nest, but is still very limited.

Loose housing systems (aka floor barns, or free-run barns) provide hens with a much expanded repertoire of behavioral

A free run barn in Ontario

A free run barn in Ontario

abilities, allowing hens to lay eggs in a nest, dustbathe, and forage. Hens are motivated to perform all of these behaviours, although to differing degrees. The barn in the picture has perches, although not all do. Aggression is higher in this housing system, and bone fracture incidence is around 60%. Ammonia and dust levels are high, with levels that are 3-4 times that of aviaries. Affective states are extremely variable, heavily dependent on the rank of the hen in the social hierarchy. The affective states are generally thought to be better overall than conventional cages. Natural living is improved over cages, due to the ability to nest and perch, but still limited.

Aviary housing is a system in which the hens are free in the barn and can access different levels throughout the barn. This system results in the best bone strength, but perversely the highest number of fractures, with up to 85% of the hens

An Aviary Barn in Ontario

An Aviary Barn in Ontario

getting a broken bone by the end of the lay cycle. Aviaries provide the widest repertoire of behavior, and the various heights allow submissive hens to escape effectively, and thus aggression is reduced from free-run barns. Ammonia and respirable dust are intermediate between cages and free-run, with levels 5-7 times that of cage barns. Affective states are assumed to be better than free-run barns, due to decrease in aggression and the thus fear, but are still dependent on social hierarchy. Natural living is improved over free-run due to the ability to fly, and perch in high sections of the barn.

Free range flocks have the ability to go outside. The range may be associated with a free-run barn, an aviary, or no permanent structure, only a mobile shelter to provide food, water and shelter. In Canada, free ranging can only occur during times of the year when the weather is reasonable. For several months of the year, the flocks are essentially free-run or aviary flocks, since going outside in the winter is not practical. Chickens in this type of housing have the ability to explore, experience weather and natural light and perform all their natural behaviors. These behavior benefits come at the cost of increased mortality, increased infections, predation and poor environmental control, resulting in thermal stress and discomfort from poor environmental condition such as mud and rain. Affective state is very good due to the ability to control her destiny, and make choices. Natural living proponents assess this housing system as far superior due to the range of natural behaviours it enables.

On top of all the considerations inherent in the physical layout of each housing system, the ability of the farmer to manage each barn can overcome many of the welfare differences between the systems. A well-managed cage barn will provide better welfare than a poorly managed aviary. The reverse is also true.

It is obvious that the three paradigms for evaluating animal welfare are often at odds with each other, and that each housing system satisfies each scheme to a greater or lesser extent. The housing system that provides the best welfare depends on the priority you place on each of the ways of measuring welfare. If natural living is the most important priority to you, cage systems will never be considered good providers of animal welfare. If you feel that it is preferable for the hens to be bored, rather than at greater risk for illness and dying, cages provide unparalleled welfare advantages. The relative importance of each area of welfare assessment is a philosophical decision that varies from person to person.

Add to this the impact that different housing systems have on food safety, egg quality, economics and the environment, and it is staggeringly complicated to compare the benefits of each housing system. It is far too simplistic to state that any housing system is inherently better than another, let alone that any of them are unacceptable or ideal. Anyone who can make this type of declaration likely doesn’t appreciate the complexity of the issue.

Mike the Chicken Vet

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Lay , D.C., Fulton, R.M., Hester, P.Y., Karcher, D.M., Kjaer, J.B., Mench, J.A., Mullens, B.A., Newberry, R.C., Nicol, C.J., O’Sullivan, N.P., Porter, R.E. Hen welfare in different housing systems. Poultry Science 2011;90, 278-294.

Rodenburg, T.B., Tuyttens, F.A.M., Reu, K.D., Herman, L., Zoons, J., Sonck, B. Welfare assessment of laying hens in furnished cages and non-cage systems: an on-farm comparison. Animal Welfare 2008;17, 363-373.

Sherwin, C.M., Richards, G.H., Nicol, C.J. Comparison of the welfare of layer hens in 4 housing systems in the UK. Brit Poultry Science 2010;51, 488-499.

Wilkins L.J.,McKinstry J.L., Avery N.C., Knowles T.G., Brown S.N.,Tarlton J., Nicol C.J. Influence of housing system and design on bone strength and keel bone fractures in laying hens. Veterinary Record 2011;169:414-421.

Nimmermark, S., V. Lund, G. Gustafsson, W. Eduard. Ammonia, dust, and bacteria in welfare-oriented systems for laying hens. Annals Agricultural Environmental Medicine 2009;16:103-113.