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My cat is sick, not eating, losing weight. What further vet tests?

Updated On September 23rd, 2025

Pet's info: Cat | British Shorthair | Male | neutered | 6 years and 4 months old | 12.5 lbs

Hi, my cat (6 yrs old) has not been acting like himself lately. He barely eats and drinks, has lost about 1kg, and constantly looks weak and tired. We have taken him to the vet a few times-he received 3 fluid transfusions (vet said he was dehydrated), had an x-ray, and an extensive blood test which revealed a slightly high level of Creatinine, but a second test showed normal levels. He also had an abdominal ultrasound done which revealed nothing. Do you have advice on further tests we should do?

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on October 15th, 2018

HI, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Newton! Wow, you have done a lot and I am surprised you haven't found an answer. I would be sure fecal testing has been done and feline leukemia/FIV testing, chest X-rays, B12/folate/TLI/PLI testing then I would take him to surgery to explore his abdominal cavity and I would biopsy everything. Looking for lymphoma. He should have a feeding tube (esophageal) placed a surgery so he can be fed while you wait for biopsy results. Also if it has been more than 1 month since the CBC/Chemistry has been ran I would repeat it. I wish you the best

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