Get ahead of the cold before it bites

British winters are rarely dramatic, but they are long, damp and sneaky. A flock that shrugs off a crisp December morning can still struggle through a week of freezing fog followed by a sudden thaw. Chickens cope with cold far better than they cope with wet and wind, so the aim of winter care is not to heat the coop but to keep birds dry, draught-free at body level and well supplied with unfrozen water. Hens with a good layer of feathers and a full crop at dusk can handle temperatures well below freezing, so resist the urge to wrap them in blankets or install a heater. Focus instead on the handful of jobs that genuinely matter when the mercury drops.

Keep drinkers flowing, not frozen

Frozen water is the single biggest winter risk in a small garden. A hen can go without food for a day, but she needs water to digest what is already in her crop, and a bird that cannot drink will stop eating within hours. Thirsty hens also stop laying first and show the effects of dehydration last, by which point they can be in real trouble.

• Bring drinkers indoors overnight, or tip them out and refill with fresh water each morning. This single habit solves most freezing problems.
• Choose a dark-coloured or thick plastic drinker rather than thin galvanised metal. Dark plastic absorbs a little warmth from weak winter sun, and metal conducts the cold straight into the water.
• Stand drinkers on a slab of paving or a piece of timber rather than bare soil or grass. Cold ground pulls heat out of the base and speeds up freezing.
• Float a clean table tennis ball in larger drinkers. It moves as the birds peck and the surface water stays open for longer.
• Position drinkers in a sunny, sheltered spot and move them as the sun tracks across the garden through the day.
• Never add salt, sugar, antifreeze or glycerol to drinking water. Antifreeze is highly toxic to poultry and even a small spill can kill a bird.

Check drinkers at least twice a day during a cold snap, ideally morning and mid-afternoon. If you keep a small flock in a modest garden, it is worth having a spare drinker indoors so you can swap a thawing one for a fresh one without any fuss.

Build a windbreak, not a sealed box

Draughts at hen height cause far more suffering than cold air in general. A coop that is sealed tight will trap damp from droppings and breath, and damp birds chill quickly. What you want is excellent ventilation high up and no wind whistling across the perch at night.

• Fix a clear corrugated plastic panel to the windward side of the run, leaving the top quarter open for airflow.
• Use woven willow hurdles, tarpaulin over a sturdy frame, or a length of windbreak netting on the exposed side of the run. Garden centres sell netting specifically for this purpose and it lets light through.
• Check ventilation slots and roof vents are clear and covered with mesh. High-level airflow is your friend; a stuffy coop is a recipe for respiratory problems.
• Raise the coop a few inches on bricks or timber if the run sits on clay or in a low corner of the garden that floods.
• Bank up a deep layer of dry straw, wood shavings or hemp bedding in the run to lift birds off cold, wet ground.

If you use a tarpaulin, secure it properly with bungees or battens. A flapping sheet in a January gale will frighten the flock and might well end up in next door's garden.

Protect combs and wattles from frostbite

Frostbite is more common in the UK than many keepers expect, particularly in single-combed breeds with large, floppy combs such as Leghorns and Minorcas. The vulnerable parts are the comb, the wattles and the tips of the toes. Damage happens when damp skin freezes, so a dry bird with a well-ventilated but draught-free coop is already well protected.

• Rub a thin film of petroleum jelly or a plain, unscented barrier cream onto combs and wattles before a forecast hard frost. This keeps damp off the skin.
• Watch for pale, white or greyish patches on the comb. Mild frostbite shows as a waxy, slightly swollen look before it turns dark.
• Do not rub or massage a frostbitten comb. Warm the bird gradually in a cool room, then let it recover at its own pace.
• Keep bedding dry and change it more often than in summer, as damp litter raises humidity inside the coop.
• Consider breeds with small combs and rose or pea combs if you are planning to add birds and worry about cold.
• If a comb does turn black, do not pick at it. The damaged tissue will slough off on its own and the bird will heal, though the comb may be permanently marked.

Feet are also at risk if birds stand on wet, frozen ground for hours. Dry bedding and a windbreak solve most of it, and a small slab of timber under the pop hole stops a permanently muddy, freezing patch forming right at the door.

Adjust feed, bedding and daily routine

Cold weather increases a hen's energy needs, so give a little more than usual and choose a good quality layers' pellet. A handful of mixed corn or a scratch feed in the late afternoon gives slow-release energy overnight, but keep treats to a small proportion of the diet so the birds still get balanced nutrition. Warm mash made with hot water is a lovely treat on a bitter morning and a good way to get extra fluid into them.

• Top up feeders before dusk so birds can fill their crops before roosting.
• Keep grit available at all times. Hens need it to digest grain, and a bird without grit cannot make full use of a late corn supper.
• Clean drinkers daily. Winter water stays fresher when it is changed often and does not get the chance to freeze solid.
• Do a quick headcount at dusk to make sure nobody is shut out of the coop.
• Check that perches are wide enough for hens to sit flat and cover their feet with their breast feathers. A narrow perch leaves toes exposed to the cold.

A little routine goes a long way. Bring the drinker in at night, do a morning thaw-and-refill, and check combs and feet while you are scattering feed. Half an hour a day in winter keeps a small flock comfortable, laying steadily and ready for spring.