Why is my horse biting at its belly or between its legs? | arlo.® Atlas

Read time: 3 minutes

Overview

If your horse is biting at its belly or between its legs, flies and midges are one of the most common reasons, especially in warmer weather or around turnout times. It can also happen if the skin is irritated, sore, dirty, or reacting to something in the environment, so it’s worth checking a few simple things before assuming it’s just insects.

Things To Check

1. Check whether it happens more at certain times of day, after turnout, after exercise, or when flies are most active.

2. Look closely at the belly, sheath or udder area, inner thighs, and between the hind legs for redness, scabs, swelling, broken skin, dampness, or rubbing.

3. Check whether the coat is dusty, sweaty, muddy, or sticky, as this can make skin feel more irritated and attract more attention from insects.

4. Notice whether your horse is also stamping, swishing its tail, restlessly shifting weight, or trying to bite at other parts of the body.

5. Think about any recent changes such as new turnout fields, new bedding, different grooming products, clipping, or washing routines.

6. Check for other signs of discomfort such as sensitivity when touched, hives, hair loss, or a stronger reaction after exercise or sweating.

7. If the horse is living out, look at whether there is shelter, shade, and a way to get away from insects for part of the day.

Common Causes

Flies and midges are the most common cause, especially if the horse is biting at the lower belly, inside the thighs, or between the hind legs during summer. Some horses are simply much more reactive to bites than others.

Skin irritation is another common reason. Sweat, mud, wet bedding, friction from tack or rugs, and dirty skin can all make the area uncomfortable.

Allergic skin reactions or sweet itch type sensitivity can also cause biting, rubbing, and general restlessness, although the pattern is often broader than just one spot.

Less commonly, there may be a sore patch, minor wound, or irritation around the sheath, udder, or groin area that is prompting the behaviour.

What To Do

Start by checking the area gently and seeing whether there is an obvious patch of irritation, mud, sweat, or rubbing. If the skin is dirty, careful cleaning and drying may help the horse feel more comfortable.

Reduce fly pressure where you can by using shade, shelter, turnout timing, and good stable hygiene. Keep an eye on whether the behaviour improves when insects are less active.

Monitor the pattern for a few days. If it’s only happening in obvious fly-heavy moments, that gives you useful information about what’s driving it.

If the area looks sore, the biting is persistent, or the behaviour is getting worse rather than settling, it’s sensible to ask your vet for advice.

Products That May Help

During fly season, some owners find it useful to review their routine for keeping their horse more comfortable around biting insects and summer irritation.

Horse Fly Sprays & Summer Care

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