Everything distinctive about the Clydesdale's health starts at ground level. Those long, silky feathers flowing over dinner-plate hooves are the breed's glory and its blind spot, because an entire world of skin trouble can develop underneath them before anything shows on the surface. The Clydesdale owner who learns to check under the feather as a routine, rather than when the horse starts stamping, is ahead of most of the breed's problems.
Pastern dermatitis in the folds
The skin at the back of the pastern, folded and feather-covered, stays warm and damp in wet conditions, and that is where pastern dermatitis, often called scratches or greasy heel, takes hold. Part the feather and look for scabs, crusts, cracked skin, and raw, sore patches, usually worst on the hind legs. A horse that flinches when you handle the area, or whose legs fill slightly after standing in, is telling you the skin is inflamed. Left alone, the cracks deepen, secondary infection sets in, and the soreness can lame a horse that has nothing wrong with its joints at all.
Feather mites and the stamping horse
Chorioptic mange mites live in the feather and feed on skin debris, and their signature is behavioural: a heavy horse that stamps its hind feet, rubs one leg against the other, bites at its legs, and grows restless in the stable, especially at night. The itching can be intense while the skin itself shows only dandruff-like scale and mild crusting. Because mites spread between horses and live in bedding, tell your vet if one horse starts stamping, since the whole group may need attention rather than just the horse making the noise.
Chronic progressive lymphoedema, the slow one
Many draft breeds, Clydesdales among them, are prone to chronic progressive lymphoedema, in which the lymph drainage of the lower leg gradually fails. The earliest sign is subtle: a leg that feels slightly thicker or firmer low down, with small crusty nodules and skin folds developing around the fetlock. Across years the swelling and thickening advance, the skin becomes more nodular and prone to sores, and severe cases distort the leg. There is no point at which it announces itself dramatically, which is why measuring and recording leg changes matters; a vet shown two years of notes can act far earlier than a vet shown one swollen leg.
Muscle and movement in the heavy breeds
Draft breeds are also on the watch list for muscle disorders that produce tying-up: stiffness, sweating, reluctance to move, and firm, painful hindquarter muscles after work, particularly after rest days on full feed. Shivers is the other classic, an abnormal hind-leg movement where the leg hikes and trembles when the horse backs up or has a foot lifted, most visible during farriery. Report either pattern promptly, because management of both is far more effective when the diet and exercise picture is reviewed early.
A weekly habit under the feather
Once a week, part the feather on all four legs, look and feel, and write down what you found leg by leg, including measurements if a leg is being monitored. Keeping that record with skin treatments, mite episodes, and farrier notes in KinsLe's Pet Passport builds the long, slow timeline that feather problems and lymphoedema both demand, and it travels with the horse if it is ever sold or loaned.