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My cat is lethargic, not eating, losing weight. Should I see a vet?

Updated On September 23rd, 2025

Pet's info: Cat | Siamese | Female | spayed | 6 lbs

Cats lethargic. Not eating or drinking. Loss of weight really showed today. Thought she had a cold.

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on February 21st, 2018

Poor Katrina! Unfortunately, these are very vague symptoms that could be caused by almost any kind of illness, so it's hard to say what might be wrong without being able to examine her and run some tests. She may have a systemic illness like liver or kidney disease, some type of infectious disease like FIP (feline infectious peritonitis), or even cancer. Not eating for more than 24 hours in cats always warrants a vet visit, because they can develop a serious liver problem called hepatic lipidosis when they don't eat, in addition to whatever illness is causing the inappetance in the first place. So, I would definitely recommend taking Katrina to the vet today for an exam. He/she can do blood work or other testing if needed to help diagnose the problem and get her started on appropriate treatment.

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