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Why are fleas still on my cat and in my house after treatment?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 3 years and 2 months old | 13 lbs

We noticed last week that Chubbs had fleas, we admisnistered Advantage that we purchased at Petco. Tomorrow is a week and we’re still finding fleas on Chubbs and around the house! Did we not administer the treatment correctly, should do another treatment? We’re going to bomb the house too, is there anything else we should do, he is also not an outside cat, he’s always indoors, but sits by open windows when it’s nice. Thanks.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on October 15th, 2019

If you haven't treated the house, that will be a continuing source of fleas. I would call an exterminator to kill the fleas. As for Chubbs, give him Capstar once a day for the next seven days. It's safe to give one pill daily, and starts killing fleas in 30 minutes. When it has been two weeks since you last applied the Advantage, you can apply another dose. I hope this helps!

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