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My cat has dark eye discharge after URI treatment. Is it normal?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Longhair | Female | spayed | 4 years and 7 months old | 7 lbs

Recently adopted a cat, noticed her eyes seemed a bit pink but thought that was how she looked. Within a week or so she started getting yellow/green eye discharge, no other symptoms (she does seem to sleep a lot and isn't very interested in play not sure if just personality). Vet diagnosed with URI and given Isathal eye gel twice daily for about 10 days. Discharge cleared up, a week or so passed. Now she is having dark coloured eye discharge. Wondering if I should continue using Isathal again?

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1 Answer

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Answered By David Darvishian

Veterinarian

Published on August 28th, 2017

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear that Marigold had an upper respiratory infection. A dark colored discharge is completely normal and is just what accumulates near the corner of the eye. It consists of the dried discharge left from the tear film that gets deposited onto the eye and flows across the eye. Unless you notice redness and a green or yellowish discharge I wouldn't worry. A clear discharge with a lot of squinting and redness would be something to have your vet evaluate right away. Sounds like this is completely normal and is found in both normal cats and dogs. Good job treating the conjunctivitis, sounds like it has resolved.

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