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My dog has worms, but dewormer isn't working. Could they be tapeworms?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | unneutered | 2 years and 2 months old | 45 lbs

My foster has worms that have not improved with treatment. He was given heart worm medicine over a week ago and Pyrantel 2 days ago. His poop has not been formally tested by the shelter he is from. He has vomited twice in the last 3-4 days. Do these look like round worms as the shelter thinks, or is it possible he has something else?

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1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on March 29th, 2020

Those are tapeworm segments. The dewomers you gave likely did not contain the dewormer for tapeworms. Tapeworms need a special dewormer called praziquantel. You need to dose now and again in 3 weeks. https://www.petco.com/shop/en/petcostore/product/bayer-tapeworm-dewormer-tablets-for-dogs

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