What should I do if my horse seems distressed by flies but I cannot see any insects? | arlo.® Atlas

Read time: 3 minutes

Overview

If your horse seems bothered by flies but you can’t see any insects, it could still be reacting to very small flies, hidden irritation, or the early signs of skin discomfort rather than obvious biting flies. Bot fly irritation is one possible cause, but it’s not the only one.

The good news is that there are a few sensible checks you can make straight away, and most owners can gather useful clues before deciding whether to call the vet.

Things To Check

1. Notice when the behaviour happens most. It may be after turnout, during grooming, at dusk, in windy weather, or when the horse is in the stable.

2. Look closely at the face, ears, mane, tail, belly and legs for rubbing, flicking, stamping, head shaking, redness, scabs or broken skin.

3. Check the coat and skin for tiny bumps, dandruff-like debris, crusting or areas where the horse seems more sensitive than usual.

4. Look for signs around the nostrils, eyes and ears, as some irritation is easy to miss unless you inspect these areas carefully.

5. See whether the horse is worse after sweating, exercise, clipping or grooming, as these can make skin feel more irritated.

6. Check the stable, field and turnout routine for muddy areas, standing water, muck heaps or places where small insects may gather even if you cannot spot them easily.

7. Pay attention to any change in appetite, comfort, performance or general attitude, especially if the behaviour seems new or persistent.

Common Causes

The most common reason is irritation from very small flies or other biting insects that are hard to see, especially in warm or still conditions.

Bot fly activity can also make horses seem unsettled, particularly if they’re reacting to eggs or irritation around the face, legs or coat rather than to obvious flying insects.

Skin sensitivity, sweating, mud, loose hairs, grooming irritation or a mild skin issue can sometimes look like fly annoyance.

Less commonly, a horse may be reacting to another discomfort such as a sore area, tack rubbing, facial irritation or an ear problem that makes them restless and difficult to settle.

What To Do

Start by observing the pattern and making a quick note of where and when the behaviour happens. That often gives the clearest clue.

Check the coat and skin carefully, especially around the face, ears, belly, legs and tail. If you find dirt, loose hair or dried sweat, gentle grooming and routine washing may help make the horse more comfortable.

Reduce the chance of irritation by keeping turnout areas as tidy as you can, removing standing water where possible and avoiding unnecessary exposure at the times when insects are usually most active.

If the horse is rubbing, stamping or head shaking, keep handling calm and consistent. Sudden changes to routine can sometimes make them feel more unsettled.

If the problem keeps happening, seems to be getting worse, or you notice skin damage, it’s sensible to speak to your vet for tailored advice.

Products That May Help

If fly season is a recurring issue, a few practical items can help support your normal grooming and summer care routine. The collection below is a useful place to start when you're looking for everyday management options.

Horse Fly Sprays & Summer Care

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