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My 6-week-old kitten is losing weight despite eating plenty. Why?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | unneutered | 1.6 lbs

A 6 week old kitten I am fostering, Noah, has gone from 1.8 pounds to a little over 1.6 pounds in 3 days. He's eating plenty of food and going to the bathroom properly, so I'm worried and confused as to why he is losing weight.

1 Answer

Most Helpful Answer

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Answered By Laura Johnson VMD

Veterinarian

Published on June 19th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! I would deworm him. Intestinal parasites are almost always present in young animals as they are passed from the milk. He could be getting more lean but this could also be an early warning sign that something is going on. I would collect a stool sample and have him seen for his first vet visit. The Vet can do an exam, test his stool, feline leukemia and FIV test him and consider giving his first vaccination. I wish you and Noah the very best!

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