Hardy, but built close to the ground
The Dexter, Ireland's small dual-purpose breed, is one of the easiest cattle types to winter. Dexters are thrifty foragers with thick winter coats, and generations of keeping on small farms have left them unfussy about housing. A full barn is more than most healthy Dexters need. Their one real quirk is scale: a Dexter stands far lower than an Angus or Hereford, so a windbreak that shelters a big cow's body can leave a Dexter standing in the draft underneath it. Winter protection for this breed has to be designed at Dexter height, from the shelter walls to the depth of the mud they can comfortably cross.
Shelter sized to a small breed
A three-sided shed with a lower roofline and solid walls to the ground suits Dexters well, as does a dense hedge or a shelter belt they can tuck behind. Check that the lowest band of wall has no gaps, because that is exactly where a Dexter's body sits when lying down. The herd still needs enough space that every animal, including the smallest cow, can get under cover at once without bullying at the entrance. In wooded pasture, a dry stand of trees may be all a group of dry cows uses, but calves and milking cows deserve the shed, since they give up more body heat and condition.
Mud matters more at Dexter scale
Mud that reaches a large cow's ankles can reach a Dexter's belly, and belly-deep mud destroys coat insulation and makes every trip to the hay feeder an effort. Site the shelter on your driest ground, bed it generously with straw, and move hay feeding around or onto a hard pad so one churned patch does not become the herd's winter address. Short legs also mean deep snow and frozen ruts are harder work for Dexters than for bigger cattle, so keeping a cleared, reasonably level route between shelter, hay and water is a genuine welfare point for this breed, not a nicety.
Milk cows, calves and winter condition
A Dexter milking through winter, or one rearing a calf at foot, spends energy a dry cow does not, and she will feel a poor shelter sooner. Give lactating cows and calves the driest bedding, the calmest corner, and hay they can reach without competing with the whole herd. Dexters are easy keepers, yet easy keeping cuts both ways in winter: an over-fat cow and a quietly thinning older cow can hide in the same shaggy coat, so run a hand over ribs and hips when you handle them rather than judging by eye. Shivering that does not stop once a Dexter is fed and out of the wind, a calf that will not suck, or a cow isolating herself calls for a warmer pen and veterinary advice.
Small herd, shared knowledge
Dexter keepers are often small families where several people share the winter rounds, and details like which cow is milking and which calf looked tucked-up matter. KinsLe supports that through Family Sharing, sharing each Dexter's profile and care information with the family members who help, so nothing about the herd's winter care lives in only one person's memory.