Recognizing Eye and Ear Problems in Horses

A watery or half-squinted eye looks harmless, but the horse's eye is vulnerable and problems worsen quickly. This guide helps you recognize what you're seeing, judge how urgent it is, and decide when to call the vet — diagnosis and treatment always belong with the vet, especially where the eye is concerned.

Why an Eye Can't Wait

The cornea — the clear front surface of the eye — can go from a minor scratch to a deep ulcer within a day. A seemingly mild watery eye can be an underlying injury, debris trapped under the eyelid, or an infection just starting. The tricky part is that many eye problems look roughly the same from the outside, while their severity varies enormously.

For you, that means: you don't just "wait a day and see" with an eye. When in doubt, calling is the safe choice. Never put drops in a horse's eye yourself without the vet having seen it first — certain drops can actually make an undetected corneal ulcer worse.

Eye Signals to Watch For

The more of these signals you see at the same time, and the more intense they are, the greater the urgency:

• Tearing or discharge running down the cheek, sometimes leaving a wet streak in the coat
• Keeping the eye half or fully squeezed shut (squinting indicates pain)
• Redness of the white of the eye or the conjunctiva, or a swollen eyelid
• Cloudiness: the normally clear cornea becomes hazy, bluish, or milky
• Yellowish or green discharge instead of clear tears
• Light sensitivity: the horse turns away from bright light
• Rubbing its head against a leg, fence, or wall
• Visible debris, chaff, or a hair in or near the eye

Clear tearing without squinting can be harmless — a fly or a bit of dust. But squinting, cloudiness, or colored discharge are reasons to call that same day. A horse that's actively squeezing its eye shut is in pain, and eye pain is something you take seriously.

Common Eye Problems

The names below are for recognition, not for making your own diagnosis. Different causes require different treatment, and some look remarkably similar to each other.

A recurring inflammation that keeps flaring up and fading, in particular, belongs with the vet — even if it looks better at that moment. Such patterns can point to an internal problem that threatens vision over the long term.

What to Do Yourself — and What to Leave Alone

Your role is to keep the eye calm and avoid making it worse, not to treat it yourself.

• Call the vet if in doubt and describe what you see: is it squinting, is it cloudy, is there colored discharge, since when. Ask what to do until they arrive.
• Flush visible debris gently with clean, lukewarm water or saline solution if the horse allows it. If it's stuck or embedded in the cornea: don't remove it yourself.
• Provide shade or a dark stall for light sensitivity; that immediately relieves some discomfort.
• Keep flies away with a clean fly mask, provided it doesn't touch or irritate the eye.
• Don't use drops or ointment from your own supply or from another horse. Leftovers from a previous treatment can be harmful for a different problem.
• Don't let the horse rub it; that can turn a small injury into a large one.
• Note when it started and how it's changing — that helps the vet.

Ear Problems: Less Common, Still Recognizable

Ears rarely become an acute emergency as quickly as eyes do, but there are signals that call for attention. Watch for:

• Head shaking ("headshaking"): repeated, abrupt jerking of the nose upward or sideways, often worse in sunlight or outdoors. The cause is far from always in the ear — irritation of a facial nerve is often involved — but it's a pattern worth having assessed.
• Holding the head tilted, being listless, or losing balance. This can point to an inner ear or nerve problem and belongs with the vet.
• Sensitivity around the bridle: becoming head-shy about touch near the ears, or difficulty bridling. Sometimes there's a thickening (an "ear plug," a benign small lump inside the ear) or a tick.
• Foul-smelling discharge or crusting in or around the ear.

Don't clean the inside of a horse's ear yourself with swabs or liquid; you can easily push dirt deeper in. Cleaning the outer ear is enough. If you've only recently taken on a horse, learn what reaction to touch around the head is normal for him — that way a change stands out sooner.

Prevention and Watching for Signs

Not everything can be prevented, but a few habits help:

• Check eyes and ears during daily grooming — take a moment to see whether both eyes are clear and matching, and whether there's no discharge. See also daily horse care.
• Limit fly nuisance with a mask; flies contribute to irritation and inflammation.
• Check the stable and pasture for protruding branches, sharp edges, and nails at eye height.
• Watch out around dust and tall grass: a blade of grass or a piece of chaff is a classic cause of an irritated eye.
• Bring up eye issues during your vet visit; the twice-yearly or annual check is a good time to discuss any doubts. See veterinarian, vaccinations, and dental care.

For competition riders, one more thing is at play: an inflamed or painful eye has no place under a bridle or fly mask during work, and some eye medications fall under the doping rules. If you're unsure about competing, consult your vet and the current rules on knhs.nl.

In Short

A watery eye that the horse is squeezing shut, a cloudy cornea, or colored discharge are reasons to call the vet, not to wait and see. At most, flush a loose bit of debris, provide shade, keep flies away, and don't let the horse rub it — but never use drops or ointment on your own initiative. For ears, watch especially for head shaking, a tilted head, or foul-smelling discharge. The eye deteriorates quickly; when in doubt, calling in time is almost always the right choice, and the vet is the only right source for diagnosis and emergencies.

See also: Recognizing Colic and Other Emergencies in Horses · Daily Horse Care · Veterinarian, Vaccinations, and Dental Care