The anatomy of a chicken is one of the first things you should learn about your hens when you first get them. You'll understand your birds better and when someone points to something weird on it and asks "What's that??" you'll know the answer.
A few days ago 2 neighbour kids came to my door asking me where they could get a chick. One chick. They figured they could share it between them and also figured if anyone knew where one could procure such a thing it would be me.
Sadly for the girls I had to inform them that chickens are social animals and one little chick was likely to die of loneliness. They were quite distraught over this bit of news but accepted it.
What I didn't mention was the fact that chickens also get maggots up their anuses. I probably should have led with that to squash any further chicken hopes.
They are fun, they are cute, they are entertaining, but chickens are also, you know, weird, complicated living creatures not unlike men. Or sourdough starter.
If you're going to have chickens, you should know a few things about their unique physical features.
Table of Contents
Chicken Combs
There are a whack of different chicken combs including the single comb, buttercup comb, strawberry comb, rose comb and pea comb.
The breeds I have had have either topped their heads with a single comb or a pea comb so we'll look at those.
As an aside, I find combs to be moderately repulsive. Perhaps it has something to do with the fact that they're an organ. You know, like a kidney or a heart.
The chicken's comb is considered an organ because it has such a vital function. With no sweat glands, chickens regulate their body temperature through their combs.
Norma (Rhode Island Red) with her single comb. Cuddles (mixed breed) with her pea comb.
Single comb - Single combs are the most common. They're a series of spikes that run from the chicken's beak to the back of their head.
Pea comb - Pea combs are a series of small, short bumps. It can be a single row of bumps, or 3 rows side by side.
Single Combs are dominant in Rhode Island Reds and Pea Combs are often seen in Ameraucana or Araucanas.
A grown chicken's comb should be red. If it isn't, and looks pale, you have an unwell chicken.
CHICKEN HEALTH
A pale chicken comb could be a sign of any of these conditions:
- internal parasites (too many worms in them)
- mites
- heat exhaustion
- moulting
Of all those things the only thing you don't have to worry about is moulting. If your chicken has a pale comb but isn't moulting and losing feathers there's something wrong and you'd better figure it out.
Chicken Wattles
Just like combs, wattles come in a ranges of sizes from almost non existent to huge, flappy things.
Wattles aren't just for laughing at. Blood flow from the comb to the wattle is what helps regulate the chicken's temperature to keep it cool in the heat.
Muffs & Beards
Muffs (around the cheeks) and beards (on the front of the neck) don't seem to have any cool purpose or super-power. They're like press on nails; they're just decorative.
Baby has a beard.
Muffs and beards are seen on pure bred Ameraucana's and sometimes Ameraucana crosses like Olive Eggers or Easter Eggers.
Do Chickens Have Earlobes?
Don't be ridiculous. Of course they do. What else would they tug at the end of their comedy sketch show?
Earlobes are a good indication of what colour eggs your chicken will lay. The gene that's responsible for the colour of the earlobe is also responsible for the colour of the egg.
So. A chicken with white earlobes lays white eggs. A chicken with dark earlobes lays brown eggs. And a chicken with green earlobes will ... you guessed it ... lay eggs that taste a bit off. Just kidding. Green earlobes = green eggs. Ditto for blue.
There's no nutritional difference or taste difference between white, brown, blue or green eggs.
The chicken's ear is hidden in behind a tuft of feathers.
Beaks
Still with the whole chickens have no sweat glands thing so they need other ways to cool down, comes the beak.
Birds will open their beaks and pant just like a dog to cool down. Doing this, in combination with the work of those combs and wattles is their main defence against heat.
If you haven't figured it out by now, keeping cool is VERY important for chickens. I'm always asked about what I do with my chickens to protect them from the cold, but the cold doesn't really bother chickens, what with being covered in a duvet all year long.
The heat on the other hand will kill them quickly.
If your chicken is obviously in distress from the heat (panting vigorously, lethargic, slumped looking with a pale comb) you need to cool them down right away. Bring them inside an air conditioned house, give them cold treats like frozen grapes or hold them in a bucket of cool water to drop their body temperature.
Feathers
The duvet of feathers is what helps keeps the chicken warm in winter. In the cold months hens will fluff up their feathers creating more air pockets in between each feather that helps release and trap hot air from their bodies.
This is why chickens should NOT wear stupid sweaters. I wrote a whole post on why chickens shouldn't wear sweaters a while ago after chicken sweaters became a "thing" on Pinterest.
In the spring, they love the heat after months of cold and snow chickens will sun themselves by fluffing up their feathers and spreading out their wings to "catch" the heat and bask in it.
Chickens lose all of their feathers in the fall and grow new ones so their winter duvets are brand new, perfect and fluffy.
The new feathers that come in are called pin feathers. You should avoid touching the chicken where it has pin feathers coming in because it can be painful for them.
The Crop
When chickens eat, the food they eat for the day is stored in their crop. This sac at the very front and bottom of the chickens chest gets bigger and bigger as the day goes on and the chicken fills it more and more with food.
You can feel it with your fingers and you can even feel the food inside. If they've eaten whole grains it will feel rough and grainy.
During the night when the chicken sleeps, the food moves from the crop to the chicken's gizzard where it's "chewed". Chicken don't have teeth, so they eat small pebbles and stones, which they store in their gizzard. These stones in their gizzard, "chew" up their food.
CHICKEN HEALTH
If you can smell something horrific in your chicken's mouth it could sour crop or an impacted crop, both of which can be deadly. I know. I lost my chicken Sweetie to an impacted crop.
If you're curious and not squeamish, I performed a necropsy on her to confirm what her cause of death was. You can see in this post.
Chicken Feet
Like earlobes, chickens have a variety of coloured feet and legs, but they don't necessarily correspond to what colour eggs they lay.
The majority of chickens have bare yellow or white legs and feet, but certain breeds have slate (Ameraucana), green (Auracana) or black legs (Sumatra). There are other colours, too, those are just the most popular.
Marans, a breed originally from France, can have slate or black legs.
Ameraucana legs
Chicken legs (O.K., they're really called shanks) can also be feathered. Such is the case with Cochins and Black Copper Marans.
CHICKEN HEALTH
You should routinely check the soles of your chicken's feet. They're prone to something called bumblefoot which happens when the sole is injured and they get a bacterial infection. That infection can spread and death follows.
Death often follows anything going wrong with a chicken's health. Which makes the fact that they can survive being half ripped apart by a raccoon so weird.
Oil Gland
Even if you've owned chickens for a long time you might not know about this weird little nubby thing.
Yup. It's gross. This oil glad, that protrudes from the base of the chickens tail sticks up like a little finger. It secretes oil that the chicken uses for preening.
If you pay attention you'll notice your chicken constantly turning it's head around and gathering oil from this bump when it's cleaning itself.
The Vent
The vent is the workhorse of the chicken. It's the star of the show. The vent does it all. Poops, pees, lays an egg. It all comes out of the same place. The vent. Think of it as the chicken Vaganus.
It should be clean(ish), free of poop not smelly. I mean, don't go sticking your nose in there, but if it smells like yeast around your chicken your hen could have vent gleet.
A vent that has poop stick in the feathers around it could ALSO end in death. I know. It just never ends does it? Because poop attracts flies and flies lay maggots. This life threatening condition is known as flystrike.
I've had to deal with flystrike a couple of times and if you think cleaning your chicken's bum of poop is horrifying, you'd better do it RIGHT NOW, because you are definitely NOT ready to deal with Flystrike.
The Tail
Roosters have plumed pretty ones, hens are smaller are less impressive.
BOTH have the polarizing "pope's nose".
The pope's nose is the small, roundish, fatty disk that the long tail feathers sprout out of. It was my father's favourite part of the chicken for eating.
I just kind of ignore it.
One of the neighbour kids fathers cycled past me today, did a U turn and came back to thank me for advising them against chickens.
They were last seen researching rabbits.
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Meagan
Hey this is great for me! I laughed cause you have a sense of humor. Quite refreshing. when you have a mother who was training as a nurse when you were a kid, and you were a homebirthed child who went on to have three very wonderful homebirths herself with her own, you get really used to seeing and discussing a "VAGINUS " and there really can't be any sugar coating when it comes to knowing your shit.
Karen
Thanks Meagan! Glad you liked it. ~ karen!
Sandi
Loved your interpretation of a chicken's anatomy. It was simple, easy to understand, the photos were great but best of all down to earth & funny, hell funny! Still laughing! And yep still laughing again...
Karen
Hey Sandi! Thanks! I'll have to go back and reread that post to see what the hell was so funny, lol. ~ karen!
Ella Belle
Wow! Thank you for the very informative photos on chicken anatomy! It was really interesting! I've always been curious about where the eggs come out and what it looked like. Kind freaky though that poop, pee and eggs all come out that same little hole! Yikes, I'm thinking I might not be eating eggs now for awhile, at least until this kind of fades from my memory ; ) BTW, not that I'm looking for chicken porno or something, but what about the boys? Chicken/rooster "peckers"? I'm wondering what those look like and how chickens actually mate. Does the pecker go in that vent, or is there another entrance? Just curious, hee hee.
Karen
Chicken porn talk comin' up. Roosters do not have "peckers" :) Their mating is kindda violet with the rooster basically jumping all over the hen with his talons on her back. He lowers his vent to her vent, they meet up and he releases sperm from his vent into hers. Then he smokes a cigarette and she goes back to the girls and talks shit about him. Basically. ;) ~ karen!
Stephanie
What an informative blog! Call me ignorant, but it never occurred to me that chickens have ears or earlobes! I don't know how I thought they heard anything.?
Karen
LOL. Maybe you thought they were all mimes. :) ~ karen!
Anita
Thank you soooo much!! I am a two week long chicken chick. The pics were perfect, including up close and personal. I figure better to know all I can about my flock in order to care for them properly! My chicks are about three weeks old, fun watching them grow.
Karen
Oh! They're soon going to be at that gawky teenager stage! :) Have fun with your chicks! ~ karen!
amy freeze
Thank you! I really appreciated the up close and personal pics. I'm a newbie to this :)
The only thing that would have made it better would be pics of the areas when they are sick/have mites/etc. for comparison.
paul randazzo
I HAVE 2 PLYMOUTH ROCK AND 2 RHODE ISLAND REDS 11MOS OLD ONE OF THE REDS HAS NOT LAID ANY EGGS YET WILL IT EVER START????????
Alimah
Hey Karen, thanks for this information. I never really know that the most important part of the hen
Herbology Organics
Great Tutorial.. just about blew coffee out of my nose when I read "Vaganus".. !
Sharn
Hi there I'm wondering if you may know wat to do next , I have a 2 yr old isa brown hen who has a swollen inner part of the bottom part of her foot I've tried to squeeze it and hope she had something in it but nothing came out I then took her to the vet where he suggested antibiodics orally however these didn't make a difference , I then wrapped the foot and smothered it with magneplasm hoping it may draw out the object, prickle and currently it's still swollen and red.wat do you think
Karen
Hi Sharn. Are you sure it isn't Bumblefoot? http://www.the-chicken-chick.com/2011/07/bumblefoot-causes-treatment-warning.html ~ karen
Louise Barr
Once I joined some Korean co-workers at lunch and they offered me some spicy, red stew, with meat that looked sort of like a puckered doughnut. After eating it (was textured kind of like a gizzard), I asked what it was. One of the guys said, "We don't know the American word for it. But it's chicken butt." And yes, it certainly was! ;-)
Jona
Wow! This is really great! It's simple with brief descriptions and great pictures! :D Thank you!
Dallas
Okay phew! I already use DE...I'll have to put some in the nesting boxes though never thought of that! And I might just have to do a bum check tomorrow just to ease my worries. Thanks for your help Karen!
Dallas
Karen!! Have you ever experienced chicken mites in your flock?? I have two of my own backyard chickens and just heard about these mites!!! It sounds awful, do you do mite checks? Any advice would be appreciated....
Karen
Hi Dallas - Thankfully I haven't had mites. The one thing I do to help prevent things like mites is, I use Diatomaceous Earth. I just throw a handful into their nesting box, their sleeping quarters, the run and their dust bath every so often. And definitely every time I change their litter or straw. I even throw a bit in their drinking water every time I change it. It helps a tiny bit to cut down on Galvanized steel stink. (those waterers get gross smelling even if you bleach them). The DE is made of teeny, tiny jagged pieces of exoskeletons. Or something like that. When the mites and other soft body invaders crawl over the DE it shreds them basically. I'm not sure exactly how it all works, but it kills stuff and that's all I need to know. So if you don't have any yet, get yourself some DE. A huge bag isn't cheap but it lasts FOREVER. Like ... years. ~ karen!
Vanessa
A friend of mine used that to get rid of bed bugs. She and her roommate put the DE all over her mattress and carpet and luggage. Left it for a few days and then vacuumed them all up. No more bed bugs! She explained it pretty much he same, the crushed shells cuts up there exoskeleton which they then die from. Do you think it would work on spiders???
Karen
Not unless the spiders were legless and playing Twister. ~ karen
Gigi
Didn't realize I had missed a post so I am glad for the Best Of. So, does the wattle on a chicken act the same way as it does on a turkey? I was told theirs changes shape and color when they are excited.
Tracie
Well, I don't always comment, but I do have my morning coffee with you every day...at least I thought so until I realized I had missed the anatomy of a chicken. Guess it happens after all! I loved the window sill birds and the latest genious bucket re-vamp in particular. I have also been lovin' "Boardwalk Empire" and "Master Chef Australia." Thank you for your awesomeness!! And also the occasional "fella" pic doesn't hurt.....:)
Juliet
I did miss something this May!! So glad you added the "Best of"!! Which one of your chickies drew the short straw on the vent picture??
Lovely chickens. I have poultry envy! Do you get enough eggs to share a few with the number of chicks you have??
Karen
Juliet - There are always a few to share, but so many people want them that there's always someone who doesn't get eggs. I have enough to give away about six a week or so. Sometimes more, sometimes less. ~ karen!
nancy
Vaganus. Bwahahaha. Thanks. That made my day.
dana Niemeier
Well....i can now say i have seen a vent..up close. Thank you and thank you walnut. I think.
Debby
Hahaahahahahaha! Excellent report Karen. Now I'd like to see that with a cover and a title page please. That's an "A+" my dear.
Karen
Oooo! Thank you. I like A+'s. ~ karen