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My cat is sick, not eating, lethargic. What to do before the vet?

Updated on September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 10 lbs

What should I do to take care of our cat who's been sick since Sunday morning (lethargic, not eating/drinking on his own, discharge from eyes)? We suspect it might be a reaction to the Seresto flea collar that he had been wearing for 2 weeks. We removed the collar Sunday morning and bathed him, but there doesn't seem to be much improvement. He has normal bathroom habits and is keeping down Pedialyte today, but no appetite. We're taking him to the vet tomorrow but what's best in the meantime?

1 Answer

Most Helpful Answer

Lauren Jones VMD

Answered By Lauren Jones VMD

Veterinarian

Published on August 21st, 2017

Oh dear, I'm sorry to hear that Joey hasn't been feeling well. Since you suspect that the Seresto collar may have been causing his issues, you did the right thing by taking the collar off and bathing him. However, his lethargy, eye discharge, and loss of appetite could also be due to a virus (gastrointestinal or causing an upper respiratory infection), kidney disease, or many other health conditions. I'm glad to hear that he's going to the vet tomorrow because his vet will be able to examine him and perform any necessary diagnostic testing. In the meantime, continue offering small frequent amounts of Pedialyte or water, as well as trying to tempt Joey to eat with either meat baby foods, boiled chicken breast, or canned cat foods. Warming up any of these foods for a few seconds can make their aroma more noticeable, which can be enticing to some cats. I hope this helps and that Joey feels better soon!
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