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My cat keeps scratching his ear raw, is it his grain-free food?

Updated On September 23rd, 2025

Pet's info: Cat | Russian Blue | Male | neutered | 2 years and 8 months old | 12 lbs

My cat keeps scratching behind his ear. Has been to the vet 2x, once prescribed Tresaderm (didn't do anything), and the 2nd was given Covenia Injection & single dose of Revolution. A few days later he has reopened the would so I'm at a loss of what to do. Could it be his food? We adopted him and in the last few weeks changed him from a cheaper grain food to one that's grain free. I just want him to leave his ear alone :(

1 Answer

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on December 13th, 2016

This is probably due to a severe allergy, although it could also be fleas or mites.

 First of all, in order to rule out skin parasites, high quality flea treatment is given. It sounded like your veterinarian has done it already. The next step is to treat the allergy symptomatically and try discovering the cause of the allergy.

 Food can be indeed one the most common cause of it. Some medications can be given by the vet in order to stop the chewing and repair the skin lesions (steroids and antibiotics usually). 

There is also a nice topical spray available, it's called Cortavance and you can get it at the vets.

 Hopefully you will see some results after all this, if not you and your vet should consider starting on a long term allergy treatment.

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