The answer for a small pony in a big coat
A Shetland pony in a heatwave needs real shade, air reaching his skin through that famously dense coat, and a firm hand on grass and feed while exercise drops away. Bred for harsh northern islands, a Shetland carries insulation that serves him in a gale and works against him in a still, scorching field. Do not be reassured because he is small or because he is standing quietly; a fat, thick-coated Shetland can be quietly overheating under hair that feels merely warm to your hand on the surface.
Grass, weight, and heat arrive together for Shetlands
A heatwave usually means hard ground, stressed pasture, and then a flush of rich growth when rain finally lands, and a Shetland pony is the pony most likely to pay for that flush through his feet. This breed gains condition on forage other ponies merely maintain on, so hot-week management for a Shetland is as much about what he is not eating as about shade. Restrict his grazing with a muzzle he tolerates or a bare paddock with weighed hay, keep him off lush grass during the high-sugar afternoon hours, and feel his neck and ribs daily. A Shetland whose crest hardens, whose digital pulses feel stronger than usual, or who starts shifting weight between front feet needs your veterinarian's advice promptly, alongside being brought onto cool, deep bedding in shade.
Getting air through the coat
Brush this Shetland pony thoroughly to lift dead hair and let air move, and consider a clip for a pony who is sweating under a full coat, taking care afterward that a clipped Shetland gets shade because his natural sun protection is gone. Stand him where a breeze crosses the shelter rather than in a low field corner where hot air pools, and wet him to the skin — not just over the hair — when you hose, parting the coat along his neck and back so water actually reaches him. A Shetland's favourite trick is rolling in dust the moment he is clean, which is harmless, but check afterward that sweat and dust have not caked along the girth and between the hind legs where skin rubs in the heat.
Children, handling, and hot afternoons
A Shetland pony is often the family child's pony, which makes the heatwave rule hardest to hold: no lunchtime rides, however short, however keen the rider. Move any handling to the morning, keep sessions brief and walking-only during a hot spell, and let him rest through the hours when his small body and thick coat are already working hardest just standing still. Watch smaller children around a hot, bothered Shetland too, because even a normally patient pony can be snappy when he is uncomfortable, thirsty, and crowded in his shaded corner.
A rota that protects the pony nobody worries about
Because a hardy Shetland pony looks like the animal least likely to need checking, his water top-up and breathing check are the ones most easily skipped on a busy yard. KinsLe Care Teams puts this Shetland's midday shade visit, grass-time limit, and feet check onto a named helper's list each day, with the completion time visible to whoever feeds him in the evening.