Why Does My Dog Have Red Eyes? Causes and Treatment
Red eyes in dogs can indicate irritation, infections, allergies or serious eye conditions. Sometimes it is a harmless reaction to dust or mild irritation caused by the wind, but in other cases it may indicate conjunctivitis, keratoconjunctivitis sicca (KCS), glaucoma or corneal damage. It is essential to identify the cause quickly, as untreated eye problems can lead to pain, inflammation and even blindness. In this article, we discuss the possible causes, symptoms, treatment methods and ways to prevent red eyes in dogs.
What causes red eyes in dogs?
Red eyes can be caused by various factors. The most common causes are:1. External irritants
External factors can irritate the surface of the eye and cause temporary redness. Common causes include:- Foreign objects such as sand, grass seeds or dust that damage the conjunctiva.
- Wind, draughts or cold air that dry out and irritate the eyes.
- Hairs or eyelashes rubbing against the eye, as in entropion (inward-turning eyelids) or distichiasis (extra eyelashes on the edge of the eye).
2. Eye infections
Infections caused by bacteria, viruses or fungi can make the eyes red and inflamed. Common infections include:- Conjunctivitis: causes swelling, redness and discharge.
- Viral infections, often caused by distemper or adenovirus.
3. Allergies
Dogs can suffer from seasonal allergies or food allergies, leading to red, itchy eyes. Triggers include:- Pollen (as in hay fever).
- House dust mites, dust, mould or smoke.
- Food allergies to proteins such as beef or chicken.
4. Eye conditions and more serious eye diseases
Some eye conditions require immediate veterinary attention:- Keratoconjunctivitis Sicca (KCS, dry eyes): a tear gland disorder leading to dryness and chronic inflammation.
- Glaucoma: caused by increased eye pressure, which can lead to blindness if left untreated.
- Corneal damage due to trauma or scratches, causing severe pain and infections.
5. Hereditary conditions
Some breeds are more prone to eye problems, such as:- Entropion in Shar-Peis and Bulldogs.
- Glaucoma in Cocker Spaniels and Bassets.
- Dry eye (KCS) in Cavalier King Charles Spaniels.
How can you tell if your dog has an eye problem?
Dogs with eye problems often show clear symptoms in addition to redness. Look out for:- Excessive squinting or blinking.
- Exposure of the third eyelid.
- Eye discharge (clear, white, yellow or green).
- Swelling of the eyelids.
- Cloudiness or a blue haze on the cornea.
- Excessive rubbing or scratching of the eyes.
How do you treat red eyes in dogs?
1. First aid at home
For mild irritation, you can gently clean the eyes:- Use cooled boiled water or chamomile tea to remove dirt and discharge.
- Colloidal silver may help due to its antibacterial and antiviral properties.
2. When should you go to the veterinarian?
Go to the veterinarian immediately if:- Severe redness in both eyes.
- Eye discharge that is yellow or green
- Swelling or pain when touched.
- Cloudiness or a blue haze (may indicate glaucoma or corneal damage).
3. Veterinary treatment
Treatments vary depending on the diagnosis:- Antibiotic eye drops or ointments for infections.
- Corticosteroids for severe inflammation (not for corneal wounds).
- Artificial tears for keratoconjunctivitis sicca.
- Surgery for glaucoma or hereditary conditions such as entropion.
How can you prevent red eyes in dogs?
Preventive measures help minimise the risk of eye problems:- Keep the hair around the eyes trimmed short to avoid irritation.
- Avoid draughts and windy environments.
- Carry out regular eye checks in breeds prone to eye conditions.
- Nutrition that contains sufficient omega-3 fatty acids to reduce inflammation.
