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My kitten has worms. Why is there blood in her poop after dewormer?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | unspayed | 2 months and 27 days old

Kitten has worms started dewormer but now blood n diarria is this nirmal

4 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on June 29th, 2016

It is normal to see some blood and diarrhea when giving worming treatment. These symptoms usually last for only two to three days. Because Gypsy is so young, it will take more than one treatment to kill all the worms. The treatment you gave now will kill the adults already in her system, and the next treatment will kill the ones who have yet to become adults. If the blood in the diarrhea persists longer than 3 days, I would take her into your vet, as there may be another cause for these symptoms.

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19Pet Parents found this answer helpful

Other Answers

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on

    Your kitten may also be infected with giardia. Take a fresh fecal sample to your veterinarian for a fecal exam and specifically ask them to look for giardia. Normal wormers in the regular dosage will not hit giardia, therefore your kitty may need a stronger wormer or a certain antibiotic such as metronidazole to kill giardia.

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    6Pet Parents found this answer helpful

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    Answered By Dr. Davis

    Veterinarian

    Published on October 11th, 2018

    As long as you’re giving the medication as directed that should take care of the hookworms. Sometimes cats have blood on the poop from the poop being too hard, or from diarrhea irritating the rectal mucosa. As long as he’s eating and drinking normally I’m not overly concerned about it. Should he be lethargic or the blood continues then please take him in for an exam and treatment. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for your kitten.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on March 4th, 2019

    The blood can indicate the presence of intestinal worms or it could be irritation of the GI tract from the diarrhea previously. If there are only traces of blood, this should be ok, but keep an eye on Meika. If the bleeding continues or increases, have her seen by her vet. I hope this helps!

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    1Pet Parents found this answer helpful

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