Why Chickens Stop Laying Eggs: 12 Causes and How to Fix Each One
Egg production suddenly dropped? Here are the 12 most common reasons hens stop laying — from molt to disease — and exactly what to do about each one.
Most sudden laying stops trace to one of three causes. Daylight below 14 hours slows photostimulation and is the usual reason for autumn and winter drops; a 40-watt bulb per 100 square feet on an early-morning timer compensates. The annual molt redirects protein into feather regrowth and halts laying until the new plumage is in — two to three months for a fast molter and four to six for a slow one; hold a 16 to 18 percent layer ration rather than forcing light. Age ends the productive run altogether. Work through the remaining causes in order, since water deprivation, heat, cold, stress, obesity, parasites and disease each stop laying by a different mechanism and need a different fix.
Empty nest boxes are not always a mystery. Most of the time, the answer is hiding in plain sight — in the feed bag, the waterer, the calendar, or the coop structure itself. This guide works through every known cause of laying stoppage, from the common and easily fixed to the rare and serious, so you can diagnose your specific situation rather than guess.
One thing worth knowing upfront: chickens stop laying for reasons that fall into two very different categories. The first is biological and expected — molt, daylight reduction, age, and broodiness are all natural responses your hens are designed to have. The second is environmental and fixable — water deprivation, nutritional imbalance, heat stress, and parasites are problems that signal something in the management needs to change. Treating a molting hen the same way you’d treat a dehydrated hen makes neither situation better.
1. Daylight Hours Dropped Below the Threshold
The laying cycle is fundamentally a reproductive cycle, and it runs on light. Specifically, hens need a minimum of 14 to 16 hours of daylight — natural, artificial, or combined — to sustain strong egg production. When daylight hours fall below 14, the ovaries receive less photostimulation and a hormonal response slows or stops production entirely.
This is the most common cause of autumn and winter laying drops, and it surprises keepers every year because the flock was fine in September and suddenly isn’t in November. The math is simple: northern latitudes drop to 9 or 10 daylight hours by December. That’s 4 to 6 hours short of what a hen needs.
Fix: A single 40-watt bulb per 100 square feet of coop space, set on an automatic timer, compensates for the shortfall. Add the light in the early morning rather than the evening. Evening light causes the coop to go suddenly dark while hens are still active, which creates stress and sends birds roosting on the floor instead of on the perch. If you miss even a day or two of manual switching, hens may stop laying and not resume until spring — another argument for an automatic timer and consistent light and dark hours.
2. Annual Molt
Every hen goes through a molt as autumn day length falls away, shedding old worn feathers and growing an entirely new plumage. Feathers are protein-heavy and especially demanding of methionine, so the body redirects protein away from egg production and into feather regrowth. Fast molters shed quickly and finish in two to three months; slow molters drop a feather at a time and take four to six. During that time, most hens stop laying.
Fix: Hold a consistent 16 to 18 percent protein layer ration and do not dilute it with scratch grain — a nutritional shortfall can prolong a molt or bring one on out of season. There is no way to shorten a molt, and forcing artificial light through one is counterproductive: the hormonal state driving feather replacement will win, and the energy mismatch can extend recovery. Timing, duration, feeding, and how to tell a molt from mites are covered in full in the chicken molting guide.
3. Old Age and Breed Expectations
Egg production follows a predictable declining curve across every breed, but where the curve starts and how steep it falls varies significantly between individuals, strains, and breed types.
Penn State puts pullets into production at around 20 weeks, so roughly 4 to 5 months for most production breeds. Output peaks in the months after that and then steps down each year: this site plans on roughly 80 percent of the previous year’s total annually, which is the figure used across the breed guides. Heritage breeds tend to hold a lower but steadier output for longer, while high-production hybrids front-load their laying and fall off sooner. Those two patterns are planning guidance rather than published figures.
Fix: There is no fix for age itself. The practical solution is to add a couple of pullets to the flock each year, maintaining a mixed-age population where younger birds are entering peak production as older ones decline. This keeps the overall flock output consistent without requiring a full replacement cycle.
4. Nutritional Imbalance
Malnutrition is not always a skinny bird. Obesity is also malnutrition — just in the opposite direction. A well-meaning keeper who supplements generously with scratch grain and kitchen treats can create a hen that is overfed on calories but deficient in the specific nutrients needed for egg production.
An egg requires protein, calcium, phosphorus, and key vitamins. A hen’s body prioritizes its own maintenance first — egg production is last on the list. When nutritional needs are not being met consistently, the body simply stops producing eggs.
Fix: Check what percentage of the diet is coming from a complete formulated layer feed. A common rule of thumb is to keep scratch grain and treats under about a tenth of total intake, with everything else coming from a layer ration of 16 to 18 percent protein. Extension guidance does not put a number on it, but it is consistent on the direction: limit treats and extras, scratch grains especially, because they dilute the ration that carries the vitamins and minerals. For a quick weight assessment, pick the hen up and feel her keel bone down the center of her chest. If it juts out sharply, she is underweight. If you cannot locate it easily under fat, she is overweight. Both indicate nutritional imbalance. Provide oyster shell free-choice in a separate container — laying hens self-regulate calcium and consume only what they need.
The Feed Transition Planner covers the correct feed type for each life stage, including the switch from grower to layer ration.
5. Water Deprivation
An egg is mostly water, and a laying hen has no reserve to draw on. Extension guidance is blunt about the margin: a shortage of water for just a few hours can reduce egg production, and hot weather shortens that window further. Production may not resume for several days after water is restored.
Water deprivation happens more often than keepers realize. A nipple drinker freezes overnight in winter. A gravity waterer runs dry on a hot afternoon. A dominant hen guards the waterer and limits access for lower-ranked birds. All of these scenarios produce the same result.
Fix: Check water twice daily in freezing temperatures and during summer heat. Provide at least one backup waterer. In hot weather, water consumption can double or quadruple — a waterer that lasted three days in March will run out by noon in July. Cool drinking water encourages more frequent drinking in heat; warm water encourages intake in cold. Use the Water Consumption Calculator to confirm you have adequate daily capacity for your flock size.
6. Heat Stress
The physiological response to sustained high temperatures directly suppresses egg production. Penn State puts the ideal range at 65 to 75°F. Heat stress begins above 80°F and is very apparent by about 85°F, at which point egg size and quality fall. Higher still and many hens stop laying altogether as the body diverts energy away from reproduction and into thermoregulation.
You can identify heat stress by behavior: panting with the beak open, holding wings away from the body, loose watery droppings, and a chicken technique called gular flutter — visible vibration of throat muscles to accelerate evaporation of warm body moisture into surrounding air.
Fix: Shade, air circulation, and consistently cool drinking water address most heat stress situations. A fan aimed across the coop floor is more effective than shade alone in still air. In extreme heat above 100°F, emergency cooling is needed — wet down the birds carefully, move them into shade, and provide electrolyte powder in the water to maintain hydration efficiency. Mediterranean breeds like Leghorns and Minorcas tolerate high temperatures better than dense-feathered cold-hardy breeds.
7. Cold Stress
Cold is less disruptive to chickens than heat — their naturally high body temperature and feather insulation give them real tolerance for freezing conditions. But cold stress still affects laying when the conditions are severe enough.
When temperatures drop significantly, a chicken’s metabolism speeds up to maintain body warmth. Shivering actively uses energy. Hens in genuinely cold conditions without adequate shelter, nutrition, or warm drinking water divert enough energy to thermoregulation that egg production slows.
Fix: Ensure housing is neither damp nor drafty — cold is manageable, but cold and wet together cause real problems. Adequate nutrition at slightly elevated caloric intake supports the extra energy demand of winter thermoregulation. Heated waterers prevent the frozen-water-equals-no-drinking problem that compounds cold stress with dehydration.
8. Stress — General and Specific
Stress without an identifiable single cause is the category that catches many keepers off guard. A flock can be visibly calm and still experiencing chronic low-grade stress from overcrowding, regular predator presence, frequent handling by strangers, or changes to the flock’s routine.
Any significant disruption triggers a stress response that may include an out-of-season molt — a sign the body is reacting to the disturbance as a threat. Predator attacks produce a particularly strong reaction: even hens that were not physically injured may stop laying for weeks after a serious scare. The reaction is similar to post-traumatic stress in mammals — the body remains on alert even after the immediate danger has passed.
Fix: Identify and remove the stressor if possible. After a predator attack, place affected hens in a quiet, darker environment with consistent food and water access until behavior normalizes, then reintegrate with the flock carefully to avoid compounding the stress with pecking order disruption. Crowding is the most commonly overlooked stressor — check actual square footage against the Coop Size Calculator to confirm your flock has adequate space.
9. Obesity
Fat accumulation in the body cavity directly impairs a hen’s ability to produce eggs. This problem is almost entirely caused by excess grain and treats, and it disproportionately affects cold-hardy breeds — breeds like Brahmas, Orpingtons, and Cochins that are genetically inclined to put on winter fat.
In climates that don’t get cold enough to burn off that accumulated fat, these breeds just keep adding body mass year over year. The result looks like a healthy, well-fed hen that inexplicably doesn’t lay.
Fix: Cut back scratch grain and calorie-dense treats. Return to a complete formulated layer feed as the dietary foundation. The keel bone check (run your finger down the breastbone — it should be palpable but not protruding) is the simplest body condition assessment. A hen where you cannot locate the keel under the body fat is too heavy for optimal laying.
10. Parasites
External parasites — red poultry mites and lice — reduce laying in two ways: through the discomfort and chronic stress of infestation, and through anemia from blood loss in serious mite cases.
Red poultry mites are nocturnal. They hide in coop crevices, joints, and nest box corners during the day and feed on birds overnight. A daytime inspection will show nothing. Check under the wings and around the vent area on the birds, and inspect the coop with a flashlight after dark — you’ll see the tiny reddish-grey mites moving if they’re present.
Fix: Treat active infestations with permethrin-based spray on both the birds and the coop (pay attention to crevices and joints where mites hide). Re-treat every four to seven days: nothing approved kills the eggs, and northern fowl mite eggs reach egg-laying adults in under a week. Lice run a roughly three-week cycle, so they also need repeat treatment. Diatomaceous earth in dust bathing areas provides ongoing preventive protection. Regular checks — monthly at minimum — catch infestations early before they reach the point of anemia and serious production impact.
11. Disease and Reproductive Disorders
Several conditions cause laying stoppage without obvious symptoms beyond the missing eggs:
Salpingitis is inflammation of the oviduct, usually caused by bacterial infection — Mycoplasma gallisepticum, E. coli, Salmonella, and Pasteurella multocida are the most common culprits. Hens with salpingitis go off lay, and the condition often only becomes visible when the hen lays a lash egg — not an egg at all, but a collection of dead tissue and solidified pus expelled from the infected oviduct. If caught early enough by a veterinarian, the infection can be treated successfully. Sourcing birds from reputable breeders reduces the risk of introducing these organisms into the flock.
Egg binding occurs when a hen cannot expel an egg that is stuck in the oviduct. She will strain, sit in unusual places on the coop floor, and appear visibly distressed. This is a medical emergency. A warm bath and careful lubrication of the vent may help if the egg is close to the opening; otherwise a vet is needed within a few hours.
Internal laying involves egg material deposited into the body cavity rather than expelled normally. The hen may walk with a characteristic penguin gait from abdominal distension. No management intervention resolves this — it requires veterinary assessment.
12. Wrong Breed for Your Goals
This one belongs at the end because it’s rarely the cause of a sudden stoppage — but it is the cause of chronic underperformance that many keepers attribute to something they’re doing wrong.
Egg production varies significantly between breeds, individuals, and strains within breeds. Sex link hybrids and production-focused breeds were developed specifically for high yearly egg output. Many heritage and fancy breeds were developed for their plumage, temperament, or show characteristics, not for laying ability. A Silkie that produces around 100 eggs per year is not malfunctioning — that is what Silkies do.
Fix: Use the Breed Selector Quiz before purchasing birds if egg production is a priority. If you already have a mixed flock and production doesn’t match expectations, check what breeds are actually in it and what their realistic annual output should be. The Egg Production Calculator estimates expected weekly and annual production by breed category and age, so you can verify whether your current output is actually below normal or just below your assumptions.
Diagnosing Your Specific Situation
The sequence that works best in practice: rule out the easily observed environmental factors first (water availability, feed quality, temperature, daylight hours, visible parasites), then consider the biological ones (molt timing, age, broodiness), then look at individual-hen issues (disease, reproductive disorders) if the problem is isolated to one bird while the flock is otherwise fine.
Multiple causes overlapping simultaneously — common in autumn when seasonal daylight reduction coincides with the first molt — can produce dramatic production drops that look alarming but resolve on their own once the new feathers are in. The key is distinguishing that pattern from a true management problem that requires intervention.
Frequently asked questions
Why did my chickens stop laying eggs?
Work the common causes in order. Daylight below 14 hours, the annual molt, and age account for most sudden stops. If none of those fit, check water, feed quality, heat, cold, stress, weight, and parasites before assuming disease.
How long do chickens stop laying in winter?
Until daylight comes back, unless you add light. Hens need roughly 14 to 16 hours to lay at full rate, and northern latitudes fall to 9 or 10 hours by December. A 30 to 40 watt bulb on an early-morning timer closes the gap.
Do chickens stop laying when they molt?
Most do, until the new feathers are in. A fast molter finishes in two to three months and a slow one takes four to six. Hold the layer ration and do not force light — see the chicken molting guide.
At what age do chickens stop laying eggs?
There is no cliff. Pullets come into production around 20 weeks, and output steps down roughly 20 percent a year after the first season. Hens live well beyond their productive years, so a quiet older hen is normal rather than sick.
Can chickens stop laying because of stress?
Yes. A predator scare, a move, a new bird, or a dog at the fence can stop production for days or weeks with no other symptom. Remove the stressor and give the flock a quiet, undisturbed routine.
How quickly does a lack of water stop egg production?
Fast. A shortage of just a few hours can reduce laying, and production may not resume for several days after water is restored. Check waterers twice daily in freezing weather and in summer heat.
Do mites make chickens stop laying?
They can, through chronic stress and through anemia in heavy infestations. Treat birds and coop together with a product approved for poultry, then re-treat every four to seven days, because nothing approved kills the eggs.
Sources
- Penn State Extension — Management requirements for laying flocks: 14 to 16 hours of light per day for maximum year-round production; pullets coming into production at around 20 weeks; the 16 to 18 percent protein layer ration with grit and a calcium source; and 10 to 12 weeks for a flock molted after 80 weeks to return to production.
- Penn State Extension — Artificial lighting for winter egg production: bulbs of 30 to 40 watts; aiming for 16 hours of light per day; and adding light in the early morning so natural sunset still tells the birds when to roost.
- Penn State Extension — Hot weather management of poultry: the 65 to 75°F ideal range; heat stress beginning above 80°F and becoming very apparent around 85°F; panting as a sign that physiological changes have already occurred; and clean cool water plus electrolytes during heat stress.
- Mississippi State University Extension — Molting of laying hens: early versus late molters at four to six and two to three months; the head-first order of feather loss; and most hens stopping production until the molt is complete.
- Mississippi State University Extension — Causes of poor feathering: feather loss at the abdomen and vent indicating northern fowl mite or poultry lice; permethrin as the treatment applied to the birds; feathers being high in methionine and deficient birds eating feathers; and mating damage on the backs and heads of hens.
- Extension — External parasites of poultry: re-treating an infested flock every four to seven days because no approved material kills the eggs; northern fowl mite eggs reaching laying adults in under a week; the roughly three-week lice cycle; treating nesting areas, roosts and crevices as well as the birds; and mites and lice reducing egg production.
- Extension — Basic poultry nutrition: a shortage of water for just a few hours reducing egg production.
- Extension — Water requirements of poultry: water consumption doubling or quadrupling in heat.
- Extension — Raising chickens for egg production: hens laying under 10 months pointing to something other than a molt; and wrong feed, dilution with scratch grains, or limited feed causing a deficiency that takes hens out of production.
- Extension — Managing backyard chickens during extreme summer temperatures: shade with proper ventilation, constant access to cool water, and limiting treats and scratch grains in heat.
Three figures that circulate widely are deliberately absent. Feathers are often quoted as 85 percent protein, molting hens as needing a 20 percent ration, and a hen’s body as 50 percent water with the egg at 65 percent; none of those appears in the extension publications cited here, so this guide gives the sourced bands and the methionine point instead. The yearly production step-down and the heritage-versus-hybrid laying patterns are this site’s planning guidance, consistent with breeds.json and the eggs per year guide, not published extension figures.
Figures are planning guidance for backyard flocks, not veterinary advice. A hen that is lethargic, losing feathers at the vent, or straining to lay needs attention rather than patience — for health concerns, consult a licensed poultry veterinarian. Last reviewed September 2026.