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Why is my feral cat still scratching after Comfortis flea treatment?

Updated On September 23rd, 2025

Pet's info: Cat | Russian Blue | Female | unspayed | 5 lbs

I have a feral cat that I have been giving Comfortis to for the last 3 mos. for her flea issue. I am crushing the pill up in a Sardine mix & she is eating it all. She still scratches all the time. she will not let me apply the flea oil. Is crushing up the pill in the Sardine mixture keeping it from working well? I'm sure she is returning to the same flea ridden place each day, but not sure where it is so I can't spray for fleas there.

1 Answer

Most Helpful Answer

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Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH

Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner

Published on May 24th, 2018

I'm sorry you're having such a challenging time with Meowsie. It certainly is good of you to treat a feral cat. Crushing Comfortis and mixing it with food shouldn't cause a problem with its absorption, so I doubt that is your problem. If you are still seeing fleas, you might ask your vet for another recommendation, but Comfortis tends to work well. Unfortunately, when a cat has flea allergies or chronic skin problems, it can take a while for the itching to improve even once the fleas have been treated. I might consider giving her a fish oil supplement daily to help improve her skin and decrease her itching. There are a number of fish oil supplements for cats such as Wellactin ( http://www.welactin.com/?pg=cat ). Good luck! I hope that was helpful. Thanks for using PetCoach.

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