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Why is my foster kitten underweight, lethargic, and has diarrhea?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 2 lbs

So I'm stuck. my little foster kitten. He is underweight (13 oz at 5 to 6 wks), has bad diahrrea but fecal sample tested neg, he always seems very sad and remains motionless when my other foster jumps on him and tries to play. He doesn't act like a normal kitten. Shelter vet insists it is just gut issues and refuses to do blood work. Vet tried pancure, metronidazole, propectalen, marquis,None work. Cant get a second opinion because the shelter wont pay for another vet. Hes vaccinated. Advice??

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1 Answer

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on June 2nd, 2018

Thank you for submitting your question regarding your foster kitten. His hair coat appears rough and he may have a crust on his nose. Has he experienced any respiratory signs such as coughing or sneezing? This would be unrelated to the diarrhea, but a compounding illness could result in poor weight gain. I would recommend checking him for panleukopenia just to be sure. If the vet will not run bloodwork, you can test a fecal sample with the dog parvovirus test. Otherwise I would consider a new diet if seeking a second opinion is not an option. I like Royal Canin Veterinary Diets Gastrointestinal High Energy canned formula. The veterinarian should be able to write you a prescription for the diet. I hope this information helps!

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