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Why Did My Hens Stop Laying? Work Through the 6 Causes in Order

The short answer

Hens stop laying for six main reasons, and the fastest way to find yours is to check them in order of likelihood: shrinking daylight, molt, heat, age, health problems, and broodiness or stress. For most US backyard flocks the answer is daylight, because hens need about 14 hours of light minimum to keep laying, with 16 hours for strongest production, and natural day length falls below that from late summer through winter. If the whole flock stopped together, suspect a flock-level cause like light, molt, or heat. If one hen stopped, look at broodiness, age, or illness.

Updated · every claim sourced below

Start with daylight: the number one cause

Check the calendar before you check the coop. Shrinking daylight is the most common reason a whole flock slows down, and it explains the classic late-summer stop that gets blamed on everything else. Sources disagree on the exact threshold: University of Florida extension puts it at about 14 hours of day length to maintain production, while the Merck Veterinary Manual describes lighting programs running 13 to 16 hours per day. The honest reading is about 14 hours minimum, with 16 hours for strongest production. The direction of change matters too. University of Georgia poultry scientists note that declining day length itself discourages laying, which is why production sags from August onward even while days still feel long. If your egg count faded as the days shortened, you probably just found your answer.

Feathers on the ground mean molt

If the run looks like a pillow fight, stop diagnosing. Your hen is molting, and molting hens do not lay: University of Georgia extension states plainly that molting and egg production are not compatible, and Mississippi State extension confirms most hens stop producing until the molt is complete. Molt usually begins as days shorten, so it often stacks on top of the daylight drop. The reason it costs eggs is that feathers are overwhelmingly protein, and the hen redirects her resources from eggs to regrowing her coat. Expect no eggs for the duration, which runs 8 to 16 weeks for most hens, with early molters taking up to six months per Mississippi State extension. A high-protein top-up such as dried grubs helps fuel feather regrowth, and our guide to what to feed molting chickens has the full numbers.

Heat shuts down laying in summer

If it is hot and the flock is panting, heat is your likely cause. Chickens are comfortable between 60 and 75 degrees Fahrenheit, per University of Minnesota and Penn State extensions. There is no single cutoff where laying stops: production dips somewhere in the upper 70s to 80s, sooner with humidity, and the effect is pronounced by 85F, where Minnesota extension says birds change their behavior and cut feed intake. The field check is simple. Panting, wings held out, and fewer eggs points to heat. Feathers everywhere points to molt. Watch for the late-summer trap: shortening days overlap the hottest weeks, so run the daylight math before blaming the thermometer. Our guide to chickens not laying in summer heat covers cooling the flock down and getting eggs back.

Age: production declines, it does not stop overnight

An older hen laying less is normal, not broken. University of Florida extension charts the curve: a pullet lays her first egg at 18 to 22 weeks, climbs to a peak around 90 percent production, meaning nine eggs per ten hens per day, then declines to about 65 percent after 12 months of laying. Each year after that, expect fewer eggs, though they tend to be larger. Laying is genuinely expensive for her body. University of Georgia poultry scientists note each eggshell carries about 2 grams of calcium while her entire skeleton holds only around 20 grams, so every egg draws roughly 10 percent of the calcium in her body. A three-year-old hen who once laid daily and now gives you three or four eggs a week is aging normally, not ailing.

Health check: parasites, disease, and water

If nothing above fits, examine the birds themselves. Start with parasites: University of Florida extension reports lice and mites can cut production 10 to 20 percent, so check around the vent for lice and mites. Disease cuts deeper. Infectious bronchitis drops production and deforms shells, and Newcastle disease can take a flock to zero with a five to six week recovery. University of Georgia warns that some diseases suppress laying with no other visible symptom, so a vet call is worth it when a healthy-looking flock stops without explanation. Check the waterer too: Florida extension notes hens are more sensitive to a lack of water than a lack of feed, drinking about twice the weight of what they eat, so a fouled, frozen, or empty waterer stops eggs fast.

Broodiness and stress: one hen, not the flock

A broody hen has stopped laying on purpose. She parks in a nest box, fluffs up and growls when you reach under her, and the Merck Veterinary Manual notes that without intervention a hen can stay broody for three to four weeks, laying nothing the whole time. University of Georgia advises collecting eggs daily so a clutch never builds up to trigger it. Stress explains most of the rest: a predator scare, new flock members, a move to a new coop, or rough handling. As one keeper on a BackYardChickens forum thread put it, "Stress can mess up egg production for weeks." These are bird-level causes, so they usually stop one hen rather than the whole flock. If every bird quit at once, go back to daylight, molt, and heat.

When the eggs come back

Recovery depends on the cause. Daylight is the one you can fix today: add a coop light on a timer, and University of Georgia's rule of thumb is to keep total light, natural plus artificial, no shorter than the longest natural day your hens experience through the year. Skip the light during molt though, since molt is the rest period, and eggs return on their own once the new feathers are in, typically with better shell and egg quality than before, per Georgia extension. After a heat wave, Mississippi State extension specialist Jessica Wells says it can take about a month to reach normal production again. A broken broody spell resolves in days to a couple of weeks, and disease recovery runs longest, with Newcastle taking five to six weeks even after birds look well.

Quick answers

How many hours of light do chickens need to lay eggs?

About 14 hours minimum, with 16 hours supporting strongest production. Sources vary between 13 and 16 hours, so treat 14 as the floor, not a guarantee.

Why did all my hens stop laying at once?

A whole-flock stop points to a flock-level cause: shrinking daylight, molt, or heat. Check day length first, then look for feathers on the ground, then panting birds.

Why did just one hen stop laying?

Single-bird stops are usually broodiness, age, or illness. Check whether she is glued to a nest box, how old she is, and inspect her for mites and other symptoms.

At what age do hens stop laying?

They slow rather than stop. University of Florida extension puts production at a peak around 90 percent, falling to about 65 percent after 12 months of laying, then declining each year after.

Should I put a light in the coop?

It works if you want winter eggs: keep total light at around 14 to 16 hours on a timer. Do not add light during molt, which is the flock's rest and rebuild period.

Could my hens be laying eggs I am not finding?

Yes, especially free-ranging hens, which can build a hidden nest anywhere sheltered. Before treating a laying problem, confine the flock for a few days and see if eggs reappear.

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