Petco Text Logo
Petco Pet Logo
  • Two Easy Ways to Start Earning Rewards!

    rewards header
    Become a member today!
    Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
    Petco Pay LogoBecome a credit card member today!

    Earn 2X Pals Rewards points at Petco
    when you use Petco Pay!

    APPLY NOW
    Learn More About Petco Pay Benefits

Why is my 8-week kitten lethargic with diarrhea and swollen anus?

Updated on September 23rd, 2025

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

I bought an 8 week old kitten 2 days ago and he has had diarrhea since we got him and has been very lethargic, I found out the previous owner had given him a worming tablet the day before we got him which she gave to me when I picked up the cat. I discovered that they were not to be given to any kitten under 12 weeks, any advice would be great as I am starting to worry for his health. He also has a swollen anus although he is still eating (dry biscuits) and drinking water fine.

1 Answer

Most Helpful Answer

Linda G,  MS, DVM

Answered By Linda G, MS, DVM

Veterinarian

Published on October 14th, 2017

Hello, & thank you for using Petco Pet Education Center, formerly Petcoach. Lethargy & diarrhea is quite concerning in such a young kitten. I am a bit worried about dehydration, even with him drinking. Most of these issues are due to intestinal parasites, such as roundworms & coccidian. Your worming tablet may take care of the roundworms, but you really need to have the stool examined for any other problems. A consult with your veterinarian will be most beneficial in getting Beans onto the road to great health. Take care.

Vote Icon1Pet Parents found this answer helpful

Smart Picks for Smart Questions

Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Share

Styled arrow button