A broody hen is one that has decided to sit on a clutch of eggs and hatch them, whether those eggs are fertile or not. She’ll park herself in the nest box for days on end, barely eating or drinking, driven by a hormonal shift that tells her body it’s time to become a mother. It’s completely normal behavior, not a sign of illness, and it happens to hens even when there’s no rooster in the flock.
What Triggers Broodiness
The driving force behind broodiness is a hormone called prolactin. During a hen’s normal laying cycle, rising estrogen levels stimulate prolactin production. Once prolactin reaches a certain threshold, it suppresses the hormones responsible for ovulation, causing the ovaries to essentially shut down. Egg production stops, and the hen’s entire focus shifts to incubating.
This isn’t a choice the hen makes. It’s a biological program that kicks in automatically. Prolactin levels in broody hens are significantly higher than in actively laying hens, and they stay elevated for the entire brooding period. That hormonal state is what keeps her glued to the nest, and it’s why you can’t simply shoo a broody hen away and expect her to snap out of it.
Longer daylight hours and warmer weather tend to trigger broodiness, which is why it’s most common in spring and early summer. Hens can go broody as young as five to eight months old, though most are at least a year old and have had a full season of laying before it happens for the first time.
How to Spot a Broody Hen
The most obvious sign is a hen who refuses to leave the nest box. She’ll sit there all day and through the night, only getting up once or twice a day for a quick meal, water, and a single enormous dropping. Other telltale signs include:
- Aggression on the nest: She’ll puff up her feathers, growl or make a low rumbling sound, and peck at your hand if you try to reach under her.
- Feather plucking: She may pull feathers from her own breast to line the nest, creating a bare patch of warm skin that sits directly against the eggs.
- Egg hoarding: She’ll gather any eggs she can reach, rolling them under her body. Some broody hens will steal eggs from neighboring nest boxes.
- Vocal changes: Her clucking becomes deeper, more persistent, and distinctly different from her normal sounds.
Broody or Sick? How to Tell the Difference
A hen sitting in the nest box all day can look a lot like a sick hen, and the distinction matters. The key difference is attitude. A broody hen is alert and defensive. When you reach toward her, she’ll puff up, growl, and try to peck you. She’s actively protecting her nest. A sick hen, by contrast, is passive. She’ll sit with her eyes partially closed, won’t react much when you touch her, and her comb will often look pale or discolored. If you lift a broody hen off the nest, she’ll march around angrily, eat and drink quickly, then race back. A sick hen lifted from the nest will just sit wherever you put her.
Some Breeds Go Broody Far More Than Others
Broodiness has been selectively bred into some chicken lines and out of others. Commercial egg-laying breeds like Leghorns rarely go broody because decades of breeding prioritized nonstop production. Heritage and dual-purpose breeds are a different story.
The breeds most likely to go broody include Cochins, Buff Orpingtons, Light Brahmas, Dark Cornish, and Buff Rocks. Cuckoo Marans and Buff Brahmas also have a strong tendency. Among bantam breeds, Silkies and Cochin Bantams are particularly notorious. If you keep Silkies, expect broodiness to be a regular event. On the other end of the spectrum, Ameraucanas, Easter Eggers, and most production hybrids tend to show little interest in sitting on eggs.
That said, individual hens within any breed can surprise you. Some Orpingtons never go broody, while the occasional Leghorn will. Genetics loads the dice, but it doesn’t guarantee the outcome.
How Long Broodiness Lasts
Left undisturbed, a broody hen will sit for about 21 days, which is exactly the incubation period for chicken eggs. Her internal clock is remarkably precise. If the eggs are fertile and hatch, she’ll transition into mothering mode. If the eggs aren’t fertile (or there are no eggs at all), she’ll typically give up after those three weeks, though some stubborn hens will sit even longer. Extended broodiness is a health concern because the hen is barely eating or drinking during that time and can lose significant body weight.
After broodiness ends, it takes additional time for her hormones to normalize and her ovaries to ramp back up. Most hens don’t return to regular egg laying for several weeks after they stop sitting. In total, a single broody episode can knock out a month or more of egg production.
If You Want Her to Hatch Eggs
A broody hen is nature’s incubator, and she’s remarkably good at the job. If you have fertile eggs and want chicks, this is your opportunity. Move her to a quiet, separate space away from the rest of the flock where she won’t be disturbed or bullied off the nest by other hens. Give her a day to settle before checking on her.
Place a chick-sized waterer and food within easy reach. Since she’s not laying, you can switch her to chick starter feed, which will also be appropriate for the babies once they hatch. Check on her once a day to refresh the food and water and clean up droppings. Otherwise, leave her alone. She’ll handle the temperature regulation, egg turning, and humidity on her own, and she does it better than most artificial incubators.
Slip the fertile eggs under her at night for the smoothest transition. Mark them with a pencil so you can identify and remove any new eggs that other hens might sneak into her nest if she hasn’t been fully separated.
How to Break a Broody Hen
If you don’t want chicks and need your hen back in production, you’ll have to actively break the broodiness. Simply collecting the eggs from under her won’t work. She doesn’t need eggs to stay broody, and she’ll happily sit on an empty nest.
Start with the gentlest approach: remove her from the nest box multiple times a day and block access to it when possible. Sometimes this is enough for a hen who’s only been broody for a day or two. If she keeps returning, escalate to what chicken keepers call “broody jail.” This is a wire-bottomed cage, elevated off the ground, with food and water but no bedding or nesting material. The wire floor allows air circulation under her body, cooling the bare skin on her breast that she’s been using to warm eggs. The lack of a cozy, enclosed space disrupts the nesting instinct.
Most hens break within two to six days in the wire cage. You’ll know she’s broken when she stops the low, persistent clucking and returns to her normal vocalizations. Let her out and watch whether she heads straight back to a nest box. If she does, she needs more time. The longer you wait to intervene after broodiness starts, the harder it is to break, so act within the first few days for the quickest results.