Winter rarely harms a healthy hen through cold alone. Damp bedding, stale air, frozen water, and wind that reaches the roost do the damage, and each one yields to a daily habit. Run a twice-daily check with exactly four points: the water is liquid and clean, the bedding is dry underfoot, every bird is out, moving, and feeding, and the ventilation openings are clear. Work the check at the same times each day, morning before your own breakfast when you can, and late afternoon before the flock roosts, because hens drink early, roost early in short daylight, and settle for a long night that can stretch past fourteen hours in midwinter.
Keep the Coop Dry and the Air Moving
Ventilation belongs high in the coop, above the level where hens sleep, so moist air from breathing and droppings can leave without a draught crossing the birds. Check that openings stay clear of frost, cobwebs, and blown bedding, and resist sealing a coop tight against the cold, as trapped moisture raises the risk of respiratory trouble and frost damage to combs on bitter nights. Bedding works when bedding stays dry, so add fresh material on top through the season, lift out any wet patch around the drinker the day you find the patch, and keep the drinker itself on a stand or in the run where spillage wets the ground outside rather than the bedding inside. A coop floor that smells sharp when you duck inside is telling you the air exchange has failed, and the four-point check exists partly to catch that failure early.
Water, Feed, and the Winter Day
Frozen water is the emergency that repeats daily, so break ice at the morning check, refill at the afternoon check, and keep a spare drinker indoors overnight so a cracked or frozen one never leaves the flock without water while you improvise. Hens eat more in cold weather to fuel body heat, so keep the feeder filled, keep feed stored dry and sealed against rodents, and offer grit access as usual for birds finding less bare ground under snow or mud. Expect laying to ease as daylight shortens, and read a drop in eggs against the calendar before reading the drop as illness. Clear a patch of run when snow lies, scatter a little feed there to draw birds out into the air, and check that pop holes and ramps stay usable rather than iced shut, because a flock kept indoors by a frozen ramp breathes its own damp air all day.
Watch the Flock at Bird Level
The third point of the check, every bird out, moving, and feeding, asks for names rather than numbers. Know which hen hangs back, which one roosts apart, and which one has stopped coming for scattered feed, and lift any bird that stands hunched with a drooping comb for a closer look at her weight, her breathing, and her vent area. Phone a vet for a hen who breathes with an open beak at rest, stops eating, or fades across two days of checks, and separate a bird that flock mates peck at while you arrange advice. Split the checks across the household on dark weekdays, with the four points written at the coop door, so a covering helper runs the identical round. Assigned as named duties at both ends of the day in Care Teams from KinsLe, the winter check keeps its four points, its timing, and its record of who confirmed each round.