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Why is my cat weak, losing weight, and not eating after normal blood tests?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 5 years and 11 months old

Hello, i have a 6 year old cat. At one point he would throw up everyday but continued eating and using his box normally so i figured her may have ate too quickly. Recently he lost A LOT of weight and won't eat or drink water. He only gives his food and water a few licks. I took him to the vet and nothing was found in his blood results. They gave him a pill for appetite but helped with nothing. Now he seems weaker and struggles to get onto furniture. Any suggestions on what the problem may be?

1 Answer

Most Helpful Answer

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Answered By Lauren Jones VMD

Veterinarian

Published on March 28th, 2017

Poor Sachi! Significant weight loss and inappetence are certainly a major concern. I'm glad to hear that his blood work (I assume a CBC, chemistry and T4?) was unremarkable. However, foreign body intestinal obstruction/blockages, intestinal malabsorption issues that can cause inflammatory bowel disease (IBD) or exocrine pancreatic insufficiency (EPI), chronic pancreatitis, or cancerous processes, do not necessarily cause changes on screening blood tests. If Sachi has not yet had abdominal x-rays or an ultrasound, consider talking to your vet about these tests as his next diagnostic step. If he has a foreign body obstructing his intestines, this is a surgical emergency, and these tests would be helpful in obtaining a diagnosis. If pancreatitis, IBD or EPI are more highly suspected, consider talking to your vet about testing for vitamins B12 and folate, as well as TLI and fPLI. I hope this helps!

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