The Animal With No Sweat Glands Worth the Name
Every other farm animal has some built-in cooling; the pig essentially has none. He cannot sweat usefully, his panting is a modest tool, and a heavy pig carries insulation he cannot take off. Wild pigs solve this with mud, and domestic pigs are wired to do the same: a wet wallow cools by evaporation as the mud dries slowly on the skin — far more effective than plain water, which runs off and dries in minutes — and the mud coat doubles as sunscreen on pale, sparsely haired skin. A pig keeper who provides no wallow in a heatwave has not made a tidiness choice; they have removed the animal's cooling system and should not be surprised when he tips his drinker over and climbs into the puddle.
Building a Wallow He Will Use
A wallow needs a shallow hollow that holds water, room for the herd's pigs to lie without fighting, and topping up through hot days, since a cracked, dry wallow cools nobody. Partial shade over it extends the hours it stays wet and cool. Keep it mud, not a deep pond — pigs want to lie in saturated earth with their bodies coated, bellies down, snouts clear. Sows with piglets need a shallow edge the little ones can scramble out of, and every wallow needs watching for the pig who monopolizes it, because the subordinate pig standing sunburned at the fence is the one the wallow was built for.
Where a wallow truly cannot be provided, sprinklers or a regularly hosed, shaded concrete area are the fallback — pigs will stand under a fine spray for long stretches, and wet skin plus any breeze gives real relief.
Shade, Water, and the Sunburn Problem
Shade over the resting and feeding areas matters alongside the wallow, since even a mud-coated pig should not have to lie in full sun at noon. Pale breeds burn fast and painfully — ears, backs, and udders blister — and a sunburned pig is sore, stressed, and off his feed; mud access prevents most of it, and proper shade prevents the rest.
Drinking water must be abundant and appealing: pigs drink heavily in heat, troughs warm and foul quickly, and a pig reducing his intake because the water is stale is sliding toward trouble. Position a trough where it stays shaded, scrub it on a hot-week schedule, and check flow — a herd draining a slow trough faster than it refills will queue, fight, and leave the lowest pigs thirsty.
Appetite, Breeding, and Quiet Hours
Pigs eat less in heat by design; feed toward the cooler ends of the day and do not chase intake with rich extras. Boars' fertility drops after heat stress and sows can lose pregnancies in severe heat, so breeding plans should bend around a heatwave rather than through it. Handling, moving, and loading pigs in the heat of the day is a genuine risk — an excited pig overheats frighteningly fast — and any necessary work belongs in the early morning.
Reading a Pig in Trouble
Heat stress announces itself as rapid, open-mouth breathing, restlessness, a pig lying stretched out and blowing in any wet patch he can find, then drooling, blotchy or reddened skin, and staggering. A pig showing the later signs needs immediate, calm action: get him into shade, wet him down — he cannot be cooled too enthusiastically with water on skin — offer drinking water, and call a veterinarian, because a collapsed pig in heat is a life-threatening emergency. Do not move him further than the nearest shade, and do not let dogs or children keep him stirred up while he recovers.
KinsLe's Care Teams turns the pig's heat routine into assigned daily duties — wallow topped up, troughs scrubbed, every pig eyeballed at midday — with completions logged so nothing is assumed done.