Why wet British weather makes legs so vulnerable

If you keep a horse in the UK, mud fever is less a question of "if" and more a question of "when". Our climate is almost perfectly designed for it: weeks of drizzle, heavy clay soils that hold water, and fields that turn to a churned-up bog by January. Add a horse with feathers, white legs or a fine, sensitive skin type and you have a recipe for sore, crusty pasterns.

The condition itself is straightforward. Prolonged wetness softens and weakens the skin around the pastern and heel, opening tiny cracks that would normally be sealed. Bacteria that live quite harmlessly on the skin surface — most commonly Dermatophilus congolensis — then get into those breaks and multiply. The result is the classic mud fever picture: matted hair, scabs, heat and sometimes real discomfort. It is not caused by mud alone, but by mud plus moisture plus damaged skin. Understanding that trio is the key to preventing it.

Spotting the signs before they take hold

Mud fever rarely appears overnight, which is good news, because catching it early makes treatment far simpler. Get into the habit of running your hands down your horse's legs every single day through the winter, even when the legs are caked in mud. You are feeling for heat, swelling and any texture change under the hair.

• Small, gritty scabs on the back of the pastern or heel, often hidden under feather
• Matted or upright tufts of hair where the skin is sore beneath
• Thickened, oozing or cracked skin, sometimes with a little pus when a scab lifts
• Heat, puffiness or tenderness when you press
• Reluctance to be groomed there, or a sudden sensitivity when you touch the leg
• In more advanced cases, lameness or swelling climbing up the leg

If your horse has feathered legs, part the hair and look properly at the skin at least twice a week. It is astonishing how much can be developing out of sight.

The washing dilemma: clean legs or dry legs?

Here is the counter-intuitive bit: over-washing is one of the most common causes of mud fever getting worse. Hosing legs every evening and leaving them damp overnight strips the natural oils that protect the skin and adds exactly the moisture you are trying to remove.

So follow a simple rule. If you can dry the leg thoroughly, wash it. If you cannot, don't. That means cold or lukewarm water (never hot), a mild, pH-appropriate horse shampoo used sparingly, and then a proper job of drying — a clean towel, then a period in a dry stable or on hard standing until the skin is genuinely dry to the touch. Avoid sharing buckets, sponges or towels between horses, as the bacteria spread easily on equipment.

Never pick or scrub at scabs. Soaking them gently with a warm, damp cloth until they soften and lift away on their own is far kinder and reduces the risk of driving infection deeper into the skin.

Barrier creams: how to use them properly

A good barrier cream is the workhorse of winter leg care, but it works best when applied to clean, dry, unbroken skin. Smearing cream over active scabs simply traps bacteria and moisture underneath, which makes things worse rather than better.

• Apply a thin, even layer to the pastern, heel and the back of the cannon before turnout
• Choose a water-resistant product — zinc oxide or a petroleum-based ointment are traditional and effective
• Remove it daily with a gentle wash or wipe, check the skin underneath, then reapply
• Do not layer fresh cream over old cream and mud; that is how infection hides
• If the skin is already broken or scabby, ask your vet before applying anything occlusive

Some owners find a light application of an antibacterial ointment on any suspicious spots, alongside a barrier cream on healthy skin, keeps small problems from becoming large ones.

Managing the field and the daily routine

You cannot control the weather, but you can control where your horse spends its turnout time and how quickly it comes back to a dry bed. Small changes add up.

• Rotate paddocks so no single gateway becomes a permanent bog
• Lay mud mats, bark or hardcore in gateways and around hay and water troughs
• Provide a hard standing area so legs can dry off during the day
• Bring in earlier if the field is deep in standing water — turn out for shorter spells rather than all day
• Keep legs clipped or trimmed if feather holds mud against the skin, but leave enough hair for warmth
• Change bedding regularly so your horse is not standing in damp shavings or straw

Consistency matters more than any single product. A horse checked, cleaned and dried daily will almost always fare better than one dealt with only at weekends.

When to call the vet

Mild mud fever usually responds to careful home management within a week to ten days. Call your vet if the leg is swollen, hot or painful, if your horse is lame, if the skin is weeping or discharging pus, if the affected area is spreading, or if there has been no improvement after a week of diligent care. These signs can point to a deeper bacterial infection or cellulitis, which needs prompt treatment and sometimes antibiotics. Winter leg care is genuinely a daily habit rather than a cure, and a few minutes each evening will save you a great deal of trouble when the rain settles in for another fortnight.