Dog Eye Discharge: Types, Causes & Treatment
Veterinary references checked with PetHealth+ · Last reviewed June 2026
By Kaiser Khan , Founder Veterinary references checked with PetHealth+ ( process ) Last reviewed Cite this page How we research & review
Clear tear overflow differs from thick yellow-green pus. Squinting, redness, or cloudiness need same-day vet care — eye injuries progress quickly.
Types
Watery (allergies, irritation), mucoid (dry eye), purulent (infection).
Breed factors
Flat-faced breeds get more tear staining and corneal ulcers.
First aid
Do not use human drops without advice — some worsen ulcers.
Related: French Bulldog breathing
Frequently asked questions
Is eye discharge always infection?
No — allergies, blocked tear ducts, and dry eye are common.
Can I clean my dog's eyes?
Yes — use cooled boiled water or vet-approved wipes, one wipe per eye.
When is eye discharge urgent?
Squinting, bulging eye, or sudden blindness — emergency.
Do puppies get eye infections?
Yes — neonatal conjunctivitis needs prompt treatment.