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My 6-week-old kitten won't eat, has diarrhea, and is losing weight.

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | unspayed | 1 year and 2 months old | 6 lbs

My 6 week old foster kitten Cheerio has had a very poor appetite the last few days. She loves KMR, but it causes her to have bad diarrhea. I've tried wet food, but she eats very little and she's losing weight fast. I've tried small amounts of pumpkin, goat's milk... Nothing seems to encourage her appetite. She went from 680 grams to 630 in less than half a day. She has been her usual feisty self aside from these problems, but I can almost see her ribs. Please help!

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1 Answer

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Answered By Jennifer Ladd, DVM

Veterinarian

Published on October 7th, 2018

Given her age there are several things that cross my mind, but a common issue in these young kittens is parasites. Sometimes their parasite burden can be so high that they cannot maintain adequate glucose levels, and also can become uninterested in food and sometimes will begin vomiting. I would recommend deworming her. Also, it would be important to rule out signs of infection and/or sepsis. I think she needs to be seen by a veterinarian right away. Such a young and small animal can deteriorate quickly even with easy to resolve issues like gastrointestinal parasites.

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