Why does my horse’s stocking up seem worse after standing overnight?

Read time: 3 minutes

Overview

Stocking up often looks worse after a horse has stood still overnight because there’s less movement in the legs. In many cases, the swelling is softer and improves once the horse is walked out or turned out, but it can also be linked to several other things, so it’s worth checking the whole picture rather than assuming it’s harmless.

Things To Check

1. Notice whether the swelling is in one leg or all four, and whether it’s the same every morning.

2. Check if the area feels warm, painful, or leaves a clear dent when you press it gently.

3. Look for cuts, mud, scabs, skin irritation, or any discharge around the lower leg or heel.

4. See whether your horse walks off normally after a short period of movement, or stays stiff or uneven.

5. Think about recent changes in turnout, stable time, exercise, bedding, or weather.

6. Make sure the swelling is not linked to a new diet, reduced exercise, or a period of box rest.

7. Compare both legs closely so you can spot whether one side is more affected than the other.

Common Causes

The most common reason is simple fluid pooling when a horse stands still for a long time. This is often more noticeable overnight because the legs are inactive for several hours.

Reduced turnout, box rest, or a drop in exercise can all make stocking up look worse. Horses that are normally in regular work may show it more clearly if their routine changes.

Mild skin irritation, mud, or minor knocks can also make the lower legs look fuller. In these cases, you may see small visible changes as well as swelling.

Less commonly, persistent or uneven swelling can be linked to a more significant problem such as inflammation or injury, especially if it does not improve with movement or is accompanied by heat, pain, or lameness.

What To Do

Give your horse regular movement if you can, as gentle exercise often helps the legs drain normally. Turnout, hand-walking, or a steady daily routine may all be useful.

Keep an eye on whether the swelling improves after the horse has been up and moving for a while. A simple note or photo taken each morning can help you spot patterns.

Check the stable routine too. Long periods of standing still, limited turnout, or very hard exercise followed by rest can all make stocking up more obvious.

If the legs are muddy or dirty, keep them clean and dry with sensible daily care, but avoid rough handling or over-washing irritated skin.

When To Contact A Vet

Speak to your vet if the swelling is only in one leg, does not go down with movement, or comes with heat, pain, lameness, or a wound. It’s also worth getting advice if stocking up is happening more often, seems to be getting worse, or your horse seems unwell.

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