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Dog's cloudy eye, green mucus, lethargy: Is it conjunctivitis?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Female | unspayed

Hi my dog right eye has been getting cloudy over the period of two days, and she's releasing a lot of greenish mucus. She squints her eye but does not seem to be in pain. She does scratch it. We took her to the vet, and he just glanced at her and said is an eye infection (no name of it) and gave us eyedrops. The eye now is more clouded and more mucus, she also is very sleepy, and she has not got up to eat or drink water. Last night she did eat. Could it be Conjunctivitis? How can I treat it?

1 Answer

Most Helpful Answer

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Answered By Lauren Jones VMD

Veterinarian

Published on July 22nd, 2018

I'm sorry to hear that Phoebe has had so many eye issues lately! Cloudiness to the eye is most commonly caused by corneal ulcers (scratches or abrasions on the surface of the eye), insufficient tear production, cataracts (if the lens within the eye is cloudy), among other issues. Green mucus does indicate that infection may be present, but this infection could be secondary to a corneal ulcer or other issue. Squinting is a sign of eye pain in dogs, so it does sound as though Phoebe is quite painful. Her sudden lethargy and loss of appetite could be related to eye pain, or could be another problem altogether. Conjunctivitis is inflammation of the conjunctiva, or the pinkish tissues surrounding the eye, and is not necessarily an actual diagnosis, but rather is a sign of other conditions. At this point, since Phoebe's eye is becoming more clouded with even more discharge despite the medication, the best thing you can do is take Phoebe back to the vet for a recheck. If your vet is closed today, I would recommend going to an emergency vet for more urgent evaluation since eye problems can progress rapidly. In all likelihood, Phoebe needs to have a full eye exam, as well as some diagnostic tests including a fluorescein stain of her eye (to check for ulcers/scratches on the cornea), Schirmer tear test (to check tear production), and possibly have her eye pressures tested. I hope this helps and that Phoebe is on the mend soon!

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