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My cat scratches, pulls fur after Sentry flea drops. What can I do?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 10 years and 11 months old | 16.38 lbs

My cat is 10. Has diabetes and asthma.i used sentry flea drops. Once last month and now this month.he is scratching and pulling his fur out in wads. What can I do for him. He's going crazy!

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on July 19th, 2018

Hello, thank you for using PetCoach. He is probably having a reaction to the Sentry. This is not the best product and I strongly recommend you stay away from using it. This product is known to have a high rate of reactions. If you are looking for an over the counter product I would use [Advantage II](https://www.petco.com/shop/en/petcostore/product/advantage-ii-once-a-month-cat-and-kitten-topical-flea-treatment-over-9-lbs) but honestly, when a cat has other underlying health issues it is best to consult with your vet as to what the best product would be to use for him. At this point in time, the best thing to do is to bathe him in Dawn dish soap in an attempt to remove any residue from the Sentry and then wait two weeks before applying a different product. Hope this helps. Best wishes.

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