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Why does my new foster cat have a droopy eye and bloody stool?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Longhair | Male | neutered | 5 months and 8 days old | 6 lbs

Good evening, I recently fostered a cat from Patio. Unfortunately as soon as Billy the cat and I arrived home I noticed that his right eye would frequently close and at the petsore Billy had a strong odorous stool. When he passes his first stool at home I noticed blood in his stool. I took him to one local get where they performed a fecal examthqt came back negative for worms. A second get diagnosed Billy with a parasite although he also tested negative. What can his droop eye & bloody stool be

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Answered By Laura Johnson VMD

Veterinarian

Published on November 9th, 2017

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Billy! I think the eye and the bloody stool are 2 separate things. The most common cause of increased blinking of the eye (from pain) is from herpes viral infections. Almost all cats have been exposed. They can either clear the virus, become chronically infected (chronic nasal discharge and congestion and/or chronic eye issues) or they become carriers and have eye or nasal flare ups with stress. Being a foster and going to a new home is stressful and likely is causing a flare up. We treat the eye with ointment antibiotics to prevent secondary bacterial infections. The eye usually improves in a week or so. Possible causes of the bloody diarrhea are: intestinal parasites, viral or bacterial infections, pancreatitis, new environment (stress) or a food allergy or intolerance. I recommend having Billy evaluated by a Vet to have his eye treated and medications for his bloody stool. Bring a stool sample to have tested for parasites. You can also start a probiotic, I like Purina Fortiflora. I hope this helps and I wish Billy a speedy recovery!

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