Watery Eyes in Dogs: When to Worry

Common Causes of Watery Eyes

Watery eyes in dogs can result from minor irritants like dust, pollen, or foreign objects such as grass seeds or dirt. These often cause temporary tearing, blinking, and squinting. Dogs who ride in open trucks or run through tall weeds are especially at risk. If the eye is not painful and the discharge is clear, the issue may be mild and resolve when the irritant is removed.

However, if the watery eyes persist or are accompanied by discomfort, it may indicate a more serious condition. For example, a foreign body trapped behind the eyelid or in the cornea can cause ongoing irritation and requires professional removal.

Signs That Mean It’s an Emergency

Watery eyes become a medical emergency when they are linked to pain. Signs of eye pain include squinting, sensitivity to light, whining, lethargy, loss of appetite, and the dog pawing at the eye. The nictitating membrane (third eyelid) may also protrude as a protective response.

A hard or soft eyeball, cloudiness, or a blue-gray appearance (corneal edema) can indicate serious conditions like glaucoma, uveitis, or keratitis. These require immediate veterinary attention, as irreversible damage can occur within hours.

What to Look For During an Eye Exam

Check both eyes for differences in size, shape, color, or pupil size. Look for discharge—clear and painless may suggest a tearing issue, while thick green or yellow discharge often signals infection or a foreign body. A film over the eye may be the protruded nictitating membrane.

Use a flashlight in a dark room to examine the cornea for cloudiness, dull spots, or abrasions. Gently press on the closed eyelids to compare firmness—unusual softness or hardness may point to internal eye problems. If the eye is painful, the dog will react to pressure.

When to Seek Veterinary Care

If your dog continues to squint, tear, or paw at the eye after removing visible debris, or if you suspect a foreign body is embedded in the cornea, do not attempt to remove it yourself. Restrain the dog and seek veterinary care immediately. Even if the eye seems fine, any change in appearance or behavior should be treated as an emergency.

A veterinarian can use anesthetic drops and specialized tools to safely examine and treat the eye, especially under the third eyelid. Do not attempt eye treatment without professional training.

First Aid and Prevention Tips

If you suspect a foreign body, flush the eye with cool water or sterile saline for 10–15 minutes using a cotton wad or artificial tears. Gently touch the object with a wet cotton swab only if it’s visible and not embedded. Never force removal.

To prevent eye irritation, avoid letting your dog ride with its head out of car windows or run through dense brush. Keep the area around the eyes clean and dry, and monitor for any signs of discomfort.