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Why is my cat still vomiting worms and blood after deworming?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 1 year and 9 months old | 13 lbs

Cats with earthworm like worms in their vomit along with some blood. Please reach out! We tried to treat for worms, but the problem won't go away and looks like it's worsening.

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on September 15th, 2019

The cats need to see a vet. We cannot diagnose worms based on your description. I suggest you get the cats to a vet so you can get a proper diagnosis of what type of worms they are and then they can be properly treated. Over the counter dewormers do not treat for every possible type of worm a cat can have. You need the diagnosis so the appropriate dewormer can be given. If they are vomiting worms they have a high worm burden and the blood is very concerning.

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