Backyard Chickens / Health

How and Why a Chicken Molts

How and why a chicken molts

I have beautiful chickens… and I’m not just saying that because they’re my chickens.

It wasn’t too long ago that they were just a flock of raggedy-looking ladies with cowlicks and bald spots, suffering through their seasonal molts (albeit with dignity).

When I look at them now, with their full and fluffy new coats and bright combs again, I’m amazed at what those ladies went through to shed and regrow all their feathers in a relatively short period of time.

Cochin and Barred Rock scratching in the garden with a mandarin tree in the background

Have you ever wondered what actually happens during a molt? How and why they start, and when those pin feathers unfurl into beautiful plumes?

Barred Rock in the beginning stages of a seasonal molt

How a chicken knows when it’s time to molt

All birds are born with a circadian clock — an internal time-keeper, you might call it. This circadian clock tells the bird the right time to lay, the best time to molt, and in some species, the proper time to fly south for the winter.

Throughout a bird’s life, the circadian clock adapts itself to the environment and falls in rhythm with not only the amount of light present in any given season, but also the intensity of that light.

This is why birds living along the equator still molt, despite the days and nights staying consistent year-round. Tropical climates all have wet seasons and dry seasons, with subtle changes in the intensity of sunlight that the birds are sensitive to.

The circadian clock is located in a bird’s pineal gland near the front of the brain. The pineal gland is “wired” to the eyes, which helps the bird perceive light. It’s the same organ responsible for the drop — and renewal — of egg production in fall and spring.

Barred Rock with new feathers starting to grow out

Why chickens molt at the same time every year

In the Northern Hemisphere, we see the circadian clocks at work when the onset of fall in September brings reduced daylight.

Our hens suddenly hunker down, slow or stop their egg laying, and seemingly break out in pillow fights every night.

Overhead view of chicken run with piles of black and white feathers in the corner

To prepare for winter, their bodies are telling them to drop all the old feathers and regrow new ones for better insulation and weatherproofing. (And yes, this still applies to chickens in warmer climates with mild to no winters; they still need a new coat for the rainy season.)

Since feathers are primarily composed of protein, egg production is often sacrificed in order to channel their protein reserves to their new feathers.

Read more: 7 Surefire Tips and Tricks for Keeping Your Chickens Healthy Through Winter

The combination of molting in fall, followed by less daylight in winter, is why your chickens may lay fewer (or no) eggs until spring.

Barred Rock with new feathers growing out on her chest

Chicken behavior during a molt

Molting takes a lot out of a chicken, and you’ll sometimes find your flock to be less enthusiastic and energetic during this time.

You might think your chickens are sick when in fact, they’re simply in a molt. They might move at a slower pace or retreat from the flock altogether; they might eat a little less and their combs will pale in color.

They’ll feed very little on crushed oyster shells, if at all, since they don’t need the extra calcium while they’re on egg hiatus.

Because of this, it’s important to maintain a routine during your chickens’ molts to help them get through it. Avoid subjecting them to physical, mental, or environmental stress, such as changing their diets, moving them to new quarters, or introducing new flock members.

If you make your own chicken feed, increase the protein content a little bit to help with feather regrowth. Or, offer your chickens high-protein snacks like dried mealworms, dried grubs, sunflower seeds, hemp seeds, or pumpkin seeds.

Hand feeding a flower head full of sunflower seeds to chickens

If you grow squash in your garden, toss them a pumpkin or winter squash (cut in halves or quarters) — chickens go crazy for this! It’s a good way to use up any bruised or blemished fruit, or a Halloween carving pumpkin that’s no longer needed. (It’s also a great way to get those dark orange yolks from your chickens once they start laying again.)

In short, picture how you feel when you’re down and out… You probably don’t want to do very much aside from resting, sunbathing, and hoping you’ll get over it soon!

Close-up of newly emerging feathers on a chest

What happens during a typical molt

For an adult hen, an annual seasonal molt can take anywhere from two months up to six months, with three to four months being the norm.

Your latest molters are also your fastest molters, completing their cycles in as little as two months. These hens are typically the most prolific layers as well, and are most desirable in terms of production birds.

Late molters include Barred Rocks, Plymouth Rocks, Rhode Island Reds, Sex Links, and Easter Eggers.

Your earliest molters will take the longest to regrow their feathers, and generally don’t begin laying again until spring. These breeds tend to lay fewer eggs compared to their quick-molting counterparts.

Think: Cochins, Brahmas, Dominiques, and showy breeds like Sultans and Polishes.

Related: Why Do Some Chickens Molt Faster Than Others?

Chickens generally molt in a predictable pattern from head to tail and from primary to secondary wing feathers (moving from axial feather to wing tip).

Overhead view of a chicken going through a molt from head to tail
Barred Rock with new feathers growing down her back
Chicken with new feathers growing out on her neck
Pin feathers growing out along a hen's back

If your chickens are going through soft molts, you might not notice this pattern as it often looks like new feathers grow in place of old feathers right away.

About the only time I notice Rosa Pecks, my Pencil Laced Wyandotte, starting to molt is when her bare bottom emerges in late summer! (Which means she’s probably been molting for a few weeks already.)

Pencil Laced Wyandotte with missing feathers on her bottom

But if your chickens are going through hard molts — as Kimora, my intrepid Barred Rock, does every year — it’s truly a fascinating study on the stages of seasonal molting.

Stage 1 of molting

When a chicken starts shedding her feathers, they’re replaced by brand new ones called blood feathers (or pin feathers).

Chicken preening the new feathers on her tail
New feather shafts along a chicken's back
Chicken going through a hard molt on her neck and chest

Blood feathers look like little pins or porcupine quills. They’re so called because they have a blood supply flowing through the spikes (stiff hollow tubes known as feather shafts), similar to the way blood flows through veins.

This blood provides the necessary nutrients to a developing feather. Most of the blood is concentrated in the base of the shaft, while the feather itself is encased in a waxy coating in the tip of the shaft.

Sometimes the shaft will crack or break, causing the feather to bleed.

If you have Cochins or Brahmas, with their abundantly feathered feet, this is fairly common as the pin feathers on your chickens’ feet can snap off from normal walking.

Cochin molting on her feet
Pin feathers on a Cochin chicken's feet

The pin feather stage is very painful for a hen, which is why most don’t like to be handled while it’s taking place.

Stage 2 of molting

You might notice in your hens that the shafts start out as tiny nubs as they’re “pushed out” of the follicles, then become very spiky with a tightly rolled appearance.

New feathers emerging on a chicken's back

As the shafts grow longer, the waxy casing loosens and the shafts take on a “furry” look as the feathers start to emerge from the tip. Oftentimes, a chicken will pull the shafts off her new feathers while she’s preening herself.

New feathers starting to emerge from the feather shafts on a chicken's back
New feathers breaking out of feather shafts on a chicken's tail
Hen pulling the shafts off her new feathers with her beak

Stage 3 of molting

Over the course of the molt and through normal preening, the waxy casing falls off to reveal the new feather.

Brand-new feathers on a chicken's tail
Newly emerged feathers on Barred Rock chicken's tail at the completion of a molt

The feather unfurls and the shaft eventually dries up, becoming the quill you’re probably familiar with. (Remember the quill pen from days of yore? It uses the hollow shaft of a bird feather as an ink reservoir.)

Hand holding several black and white chicken quills

Anatomy of a chicken feather

A fully grown feather is a beautiful thing. It’s amazing to think that something so seemingly simple took months to develop!

Diagram showing the anatomy of a chicken feather: vane, barb, rachis, afterfeathers, and quill

Newly emerged feathers are vibrant, soft, and glossy, and a hen keeps her coat looking gorgeous with help from her uropygial gland (also known as the preen gland or oil gland).

How chickens keep their feathers soft and glossy

Pull back the tail feathers on your hen and you’ll find a tiny nipple-like nub called a papilla. (I’ll admit that the first time I found this nub, I panicked slightly and thought it was a fatty tumor!)

Preen oil gland on a chicken's back
Close-up of preen oil gland on a chicken

The papilla secretes a special preen oil — I liken it to a luscious body oil we women might spray on ourselves.

The hen rubs her head and beak against the gland opening, and then spreads the oil all over the feathers on her body and wings and the skin on her legs and feet. Ahhh… instant luxury!

If you’ve ever watched your ladies bury their beaks in their chests, wings, and tails and wondered what they were doing, chances are, they’re preening themselves with preen oil.

Cochin preening herself in the garden

At the end of their molts, your hens should be back to their happy selves again, scratching in the dirt and clucking away at the first sign of worms.

When they go through the process all over again next year, learn how to help keep them healthy through winter and regrow beautiful feathers.

This post updated from an article that originally appeared on February 17, 2014.

Linda Ly About Author

I'm a plant lover, passionate road-tripper, and cookbook author whose expert advice and bestselling books have been featured in TIME, Outside, HGTV, and Food & Wine. The No-Waste Vegetable Cookbook is my latest book. Garden Betty is where I write about modern homesteading, farm-to-table cooking, and outdoor adventuring — all that encompass a life well-lived outdoors. After all, the secret to a good life is... Read more »