Chickens stop laying eggs suddenly for a handful of common reasons, and most of them are fixable. The usual culprits are shorter daylight hours, molting, heat stress, broodiness, dehydration, poor nutrition, parasites, or illness. Figuring out which one is affecting your flock comes down to timing, observation, and a few quick checks.
Not Enough Daylight
Hens need roughly 14 hours of light per day to keep their reproductive hormones cycling. As days shorten in fall and winter, egg production slows or stops entirely. This is the single most common reason backyard flocks suddenly quit laying, and it catches many first-time chicken keepers off guard because the drop can seem abrupt once daylight dips below that threshold.
If your hens stopped laying in autumn, shorter days are almost certainly a factor. You can add a light on a timer in the coop to extend the “day” to 14 or 15 hours. A low-wattage bulb is enough. Set it to turn on early in the morning rather than extending the evening, so hens still roost naturally at dusk.
Molting
Once a year, usually starting in late summer or fall, chickens shed and regrow their feathers. This process, called molting, demands enormous amounts of protein. Feathers are almost entirely protein, and a hen’s body simply can’t produce both new feathers and eggs at the same time. So egg production stops.
Good layers tend to molt late in the season, finish quickly (around 8 to 12 weeks), and get back to laying fast. Poor layers often start molting earlier and can be out of production for six to seven months. You’ll know molting is the cause if you see bare patches, pin feathers, and loose feathers scattered around the coop. During this time, switching to a higher-protein feed (around 18 to 20%) helps hens regrow feathers and return to laying sooner.
Heat Stress
Chickens are comfortable between about 65°F and 72°F (18 to 22°C). Once the temperature climbs above 77°F (25°C), heat stress begins. The effects are significant and well-documented: hens exposed to 90°F (32°C) for just four days showed an 18% drop in egg production in one study, and a 12-day stretch at 93°F (34°C) cut production by nearly 29%.
At extreme temperatures above 95°F (35°C), you may also notice thin or missing eggshells on the few eggs that do appear. Heat disrupts shell formation directly. If your hens stopped laying during a heat wave or a stretch of hot weather, that’s your answer. Provide shade, cold water, frozen treats, and ventilation. Production usually rebounds once temperatures come back down, though it can take a couple of weeks.
Dehydration
Even a brief interruption in water access has outsized effects on laying. Just 24 hours without water slightly depresses egg production, but 48 to 72 hours of water deprivation causes a severe crash. In one documented case, a flock that lost water access for two to three days took seven to eight weeks to fully recover its laying rate.
This doesn’t always mean you forgot to fill the waterer. Frozen waterers in winter, a clogged nipple drinker, or a knocked-over bucket can all cut off access without you realizing it. Check that your hens can actually reach clean water every day, and in winter, use a heated base or swap out frozen water regularly.
Broodiness
A broody hen wants to hatch chicks, whether or not there’s a rooster involved. Hormonal changes completely shut down egg production when a hen goes broody. You’ll recognize it easily: she parks herself on the nest all day and night, puffs up and growls when you approach, and plucks feathers from her chest to line the nest. Some hens go broody in response to a full nest of eggs, but certain breeds (Silkies, Cochins, Orpingtons) will go broody with no eggs at all.
A broody hen won’t lay again until she either hatches chicks or you “break” the broodiness. The most common method is removing her from the nest repeatedly and placing her in a well-lit, wire-bottomed pen with food and water but no nesting material. Most hens snap out of it within three to five days. If you leave her alone, she may sit for three weeks or longer.
Parasites
Mite and lice infestations drain a hen’s energy and blood supply, diverting resources away from egg production. Northern fowl mites, one of the most common external parasites in backyard flocks, can reduce egg production by 5 to 15% even at moderate infestation levels. A quick way to check: if you see mites on 4 out of every 100 eggs, roughly a quarter of your flock is infested.
Check your hens at night by lifting feathers around the vent, under the wings, and near the base of the tail. Mites are tiny and reddish-brown, while lice are pale and move quickly along the skin. You should also inspect coop crevices and roost undersides, where red mites hide during the day. Poultry dust or spray treatments can clear an infestation, and egg production typically recovers within a few weeks once the parasites are gone.
Poor Nutrition
Laying hens need a balanced layer feed with adequate calcium and around 16% protein. If you’ve been giving too many treats, scratch grains, or table scraps, your hens may be filling up on low-nutrition food and not getting what they need to produce eggs. Scratch grain in particular is mostly empty calories.
Calcium is critical for shell formation, and a deficiency shows up as thin-shelled or shell-less eggs before production drops off entirely. Keep oyster shell available free-choice so hens can self-regulate their calcium intake. Make sure layer feed is the main diet, with treats making up no more than about 10% of what they eat.
Egg Binding
Occasionally a hen stops laying because an egg is physically stuck inside her. This is a medical emergency. Signs include sudden lethargy, straining or spending a long time on the nest without producing an egg, an unusual penguin-like walk, a raised tail with slightly lowered wings, and distressed vocalizations. An egg-bound hen may also stop eating.
If you suspect egg binding, you can sometimes feel the egg by gently pressing the area between the vent and the keel bone. A warm soak (not hot) can help relax the muscles enough for the hen to pass the egg. If she doesn’t improve within a few hours, she needs veterinary help. Egg binding left untreated can be fatal.
Stress and Flock Changes
Chickens are creatures of routine, and disruptions can temporarily shut down laying. Common stressors include a predator attack (even an unsuccessful one), adding or losing flock members, moving to a new coop, loud construction nearby, or a dog that’s been harassing the flock. Even something as simple as rearranging the inside of the coop can throw some hens off for a few days.
Stress-related laying stops are usually temporary. Once the flock settles back into a routine and feels safe, eggs typically return within one to two weeks. If you’ve recently introduced new birds, make sure the pecking order has had time to stabilize and that all hens have access to food, water, and nesting boxes without being bullied away.
Age
Hens lay the most eggs in their first two years. After that, production declines by roughly 10 to 20% each year. By age four or five, many hens lay only a few eggs per week, and some stop altogether. If your hens are older and production has tapered off gradually rather than stopping overnight, age is the likely explanation. There’s no fix for this one, but older hens still earn their keep through pest control, composting, and flock stability.
How to Narrow It Down
Start with the basics. Check the calendar: is it fall or winter? Check the thermometer: is it unusually hot? Look at your hens: are they losing feathers, sitting on nests all day, or looking pale and tired? Inspect for parasites. Verify water access. Review what you’ve been feeding them.
Most sudden laying stops have a single, identifiable cause. If you’ve ruled out the common triggers and your hens also show signs of illness like sneezing, nasal discharge, swollen eyes, or diarrhea, a respiratory or reproductive disease may be involved. In that case, isolating sick birds and getting a diagnosis is the best next step.