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Why is my cat suddenly not eating, losing weight, and lethargic?

Updated On September 23rd, 2025

Pet's info: Cat | Scottish Striaght Longhair | Female | spayed | 10 lbs

She hasn’t eaten and has lost weight all of a sudden and won’t walk very far until laying down. What could possibly be happening?

1 Answer

Most Helpful Answer

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Answered By Jessica Keay, DVM

Veterinarian

Published on October 9th, 2018

I am very sorry to hear about Evie! There are many different conditions which can cause these symptoms in cats. Some of these would include diabetes, kidney disease, liver disease, heart disease, infections, intestinal cancer or other cancers, and more. Without doing an examination and getting more detailed history, we cannot give a more precise answer. I would highly recommend getting Evie to the vet as soon as possible. They can examine her and will likely recommend some testing such as bloodwork to try to determine what is causing her illness and if it can be treated. Best of luck to you and Evie.

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