Thick Eye Discharge in a Dog? Ask About Tear Testing

Thick or sticky eye discharge in a dog is a reason to contact your veterinarian, especially with redness, squinting or rubbing. Do not identify the cause by color alone or try leftover eye drops before the eye has been assessed.

One possible cause is keratoconjunctivitis sicca, often called KCS or dry eye. Cornell’s canine dry-eye overview explains that reduced watery tear production can cause inflammation and damage to the eye surface. Similar outward signs can have other causes, so an examination matters.

The useful question is what has been measured

Cornell describes the Schirmer tear test as part of assessment, along with other eye checks that may include staining for corneal damage. A photograph can show discharge, but it cannot measure tear production or replace an examination of the cornea.

When speaking with the clinic, say which eye is affected, when the change began and whether the dog is keeping it closed or rubbing it. Mention any previous eye diagnosis and all products recently used near the eye. Do not delay a call to collect a perfect series of pictures.

Do not turn a familiar bottle into a treatment plan

Keep packaging from any eye medicine you already have and tell the clinician its name. Ask whether it should be used before the appointment. A bottle from an earlier episode or another pet may contain a different medicine than you expect.

Avoid human redness-relief products, borrowed prescriptions and improvised rinses. If the dog appears painful or the eye looks injured, ask for prompt examination rather than waiting to see whether cleaning the discharge changes its appearance.

If KCS is confirmed, make ongoing care repeatable

Ask the veterinary team to demonstrate the prescribed application technique and explain how multiple eye products should be spaced if more than one is prescribed. Write down the actual instructions; do not choose a generic schedule from an article.

• Which product goes in which eye?
• What should you do if application is missed or not tolerated?
• When is the next examination or tear recheck?
• Which changes require an earlier call?

These are questions for an individual care plan, not instructions to use a particular drug. Cornell notes that ongoing management may be needed. Do not stop follow-up simply because the eye looks cleaner.

Keep nutrition claims proportionate

Food, fish oil and coat supplements do not establish or correct the cause of an abnormal eye discharge. If nutrition is being reviewed for another reason, bring the full diet and supplement list. PARTNER does not claim that its foods treat dry eye or prevent eye-surface damage.

The practical first step is an eye assessment with the right measurements, followed by instructions the household can carry out consistently.

Written by PARTNER Editorial Team for general education. Your veterinary team can advise on your pet’s individual health and feeding needs.