Keeping chickens through a British winter

Winter is where the romance of keeping chickens quietly goes and the logistics arrive. The run turns to mud, everything is heavier, daylight runs out before you get home, and the water freezes solid overnight and stays frozen all day.

None of it is difficult. But there are a couple of things almost everyone gets wrong the first year — one of them out of kindness — so here is what actually matters between November and March.

Do not heat the coop

This is the instinct everybody has, and it is the one piece of winter advice worth arguing about.

Chickens are far better equipped for cold than people assume. They wear a duvet, they tuck a foot up into it, and they roost pressed together with their heads under a wing. A healthy, fully feathered hen is comfortable well below freezing.

Heating the coop causes three problems:

• It is a genuine fire risk. A heat lamp in a dusty wooden box full of bedding and feathers is one of the most common causes of serious accidents in small-scale poultry keeping. It happens every single winter.
• It stops them acclimatising. Birds adjust gradually to falling temperatures. A bird kept warm never does, so it feels the cold far more on the day the power fails or the bulb goes — and that day tends to be the coldest one.
• It makes the coop damp. Warm air holds more moisture, and moisture is the actual enemy.

The exceptions are narrow: birds that are unwell, very elderly, or still growing their feathers. Those may need help. A healthy adult flock does not.

Damp is the real problem, not cold

Here is the thing that took us a season to properly understand: chickens handle cold far better than they handle damp.

A coop full of birds produces a startling amount of moisture — from breathing, and from droppings. If that moisture cannot get out, it condenses on the walls, soaks the bedding, and raises the ammonia level. Damp air also strips heat from a bird far faster than dry air, which is exactly why a sealed "cosy" coop leaves birds colder than a ventilated one.

Damp is also what causes frostbite. Combs and wattles do not freeze because the air is cold; they freeze because they are wet in cold air.

Ventilation without draughts

The distinction matters and it is easy to get right once you know it:

• Ventilation is air moving out above the birds' heads, carrying moisture with it. You want plenty.
• A draught is air moving across the birds while they roost. You want none.

So: open vents high up, near the roofline. Block anything at perch height. As a rough figure, aim for vent openings totalling around a tenth of the floor area, and resist the urge to tape them up when the forecast turns.

If you lift the lid on a cold morning and it smells sharp, or the underside of the roof is beaded with condensation, you need more ventilation, not less.

Water: the actual daily work

Birds need liquid water constantly, and a hen that cannot drink stops laying within a day and goes downhill quickly after that.

In a cold snap a plastic drinker freezes overnight and stays frozen all day. Ours needs doing twice a day through the worst of it. What helps:

• A rubber trug beats a plastic drinker. You can flex the ice straight out in one piece rather than chipping at it, and rubber does not crack when you do.
• Site it out of the wind and in whatever sun you get.
• Deeper volumes freeze more slowly than shallow ones.
• Ping-pong balls floating on the surface get nudged by the wind and slow the freeze a little. Not magic, but free.
• Heated drinkers exist and work. If you use one, run it from an outdoor-rated RCD-protected supply, not an extension lead through a window.

Don't bother with anything in the water to lower its freezing point. Nothing safe to drink will make a meaningful difference.

Mud, and the single best thing we ever did

By late November an uncovered run becomes a mud bath. It is unpleasant for the birds, it is bad for their feet, and it is where most winter foot and skin problems begin — especially for feather-footed breeds like Brahmas, where wet mud cakes onto the leg feathering and dries hard.

Coarse wood chip, laid thick, transforms a winter run. Not bark, not straw — proper arborist wood chip. It drains, it stops the surface turning to soup, the birds enjoy turning it over all day, and it composts down into something excellent for the garden. Tree surgeons will often drop a load off cheap or free rather than pay to tip it.

This was our best single discovery, and it is the thing we would tell any beginner to do before their first winter rather than during it.

A roof over at least part of the run helps enormously too — and it means you are already set up if an avian influenza housing order requires birds to be kept under cover at short notice.

Fewer eggs, and why

Laying is triggered by day length, not temperature. As the days shorten, production drops or stops. Add the autumn moult — which takes an enormous amount of protein and often runs into early winter — and you can go weeks with nothing at all.

This is normal and it is not a fault in your keeping.

You can add artificial light on a timer to keep them laying. We don't. A hen has a finite number of eggs in her, and the winter break is when her body does its maintenance. Pushing through it tends to shorten her productive life rather than extend it. If you do use light, add it in the morning rather than the evening — birds need to be on the perch before dark, and a light that snaps off at night leaves them stranded on the floor.

Feeding

They eat more in winter — keeping warm costs energy. Keep layers pellets available all day.

A handful of corn late in the afternoon is the one traditional trick worth keeping: it takes longer to digest, and that digestion generates heat overnight. Late afternoon specifically, not morning. Keep it to a treat, though — corn is low in protein and too much of it reduces laying.

Check that grit and oyster shell are still available. They matter just as much in winter, and they're easy to forget under a layer of frost.

The things that catch people out

• Foxes are hungrier and the nights are longer. More hours of darkness means more hours of risk. If you rely on remembering to shut the pop hole, this is the season it will catch you out — an automatic door opener is worth every penny.
• Frozen ground hides gaps. Check fencing after a hard frost and again after a thaw; ground movement opens up dig points.
• Snow. Most chickens hate it and simply refuse to walk on it. Throw down straw or wood chip to give them a path, or they'll stay in all day.
• Frostbite on large combs. Cockerels and single-comb breeds are most at risk. Fix the ventilation first — that's the actual cause. A smear of petroleum jelly on the comb is widely recommended and does little on its own.
• Boredom. Shorter days and a smaller usable area means birds stuck together with nothing to do, and that turns into feather pecking. A hanging cabbage, a fresh pile of leaves, or a deep layer of chip to dig through all help more than you'd expect.
• Check them in daylight. If you only see your flock by torchlight at both ends of the day, you will miss the early signs of a bird going downhill. Make time for one proper look in the light at the weekend.

The short version

Ventilate, don't heat. Keep them dry rather than warm. Break the ice twice a day. Get wood chip down before the mud arrives, not after. Accept that the eggs will stop for a while and let them have the rest.

Do those and winter is genuinely undramatic — ten cold minutes at each end of the day, and a flock that comes through it in better condition than a heated one would.