Why is my horse stocking up after a day off?

Read time: 3 minutes

Overview

If your horse stocks up after a day off, it’s often because they’ve been standing still for longer than usual and fluid has built up in the lower legs. In many horses this is mild, comes down with movement, and settles once normal exercise resumes. It can also happen more easily in horses that are stabled, under-exercised, older, or naturally prone to filled legs.

It’s worth checking the legs carefully, because while stocking up is often simple, there are other causes that can look similar. The key is to look for any heat, pain, lameness, swelling that doesn’t improve, or anything that seems out of character for your horse.

Things To Check

1. Check whether the swelling is in both hind legs, both front legs, or just one leg.

2. Feel for heat, tenderness, or any obvious pain when you touch the leg.

3. Look for cuts, mud fever, scabs, insect bites, or broken skin around the lower legs and heels.

4. Watch your horse walk on a straight line and turn if it’s safe to do so, to see whether there is any lameness.

5. Check whether the swelling reduces after turnout, hand-walking, or normal exercise.

6. Consider whether your horse has been stabled longer than usual, had less movement, or spent time on box rest.

7. Look at the rest of the horse as well, including appetite, attitude, temperature if you normally take it, and whether they seem generally well.

Common Causes

The most common reason is simple fluid build-up from standing still, especially after a quiet day in the stable or a period with less movement than usual. Horses rely on movement to help circulation in the lower limbs, so a day off can sometimes leave the legs looking puffy by the next day.

Some horses are just more prone to this than others, particularly older horses, horses that are not in regular work, or horses that have previously had filled legs.

Less commonly, swelling can be linked to a minor knock, skin irritation, mud fever, insect bites, or a problem deeper in the leg. If the swelling is only on one leg, is hot, painful, or comes with lameness, it needs more attention.

What To Do

Start by moving your horse if they seem comfortable. A calm walk in hand or normal turnout can often help the swelling reduce.

Keep to a steady routine where you can, because horses that are prone to stocking up often do better with regular movement than with long periods of standing still.

Make sure legs are clean, dry, and checked daily so you can spot any small skin issues early. If your horse lives out in muddy fields or is prone to dirty lower legs, keeping the area as clean and dry as practical may help with routine care.

If the legs are only mildly filled and your horse is otherwise bright, you can usually monitor them and see whether they improve once exercise is back to normal.

If the stocking up keeps happening, make a note of when it starts, how quickly it improves, and whether it’s linked to stabling, turnout, travel, or rest days. That pattern can be useful if you later speak to your vet.

When To Contact A Vet

Speak to your vet if the swelling is only on one leg, is hot or painful, your horse is lame, or the swelling doesn’t improve after movement. You should also call if your horse seems unwell, has a wound, or the leg filling is getting worse rather than better.

Products That May Help

If your horse is prone to filled legs after time in the stable or standing still, this collection may help support your normal leg care routine and day-to-day hygiene.

Hoof, Leg & Mud Care

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