my 10 year old Persian cat has been itching for the past month. She had the same issue 4 years ago, but I thought it was solved with a diet change since it stopped as soon as I put her on Hill's Prescription Diet z/d which is for sensitive skin and stomach. However, it has come back. I checked to see if they changed the ingredient in the food, which they did and I changed her diet to the Hill's Prescription Diet d/d and its not going away.
I've taken her to the vet and he said that it could be allergies or an ear infection which was treated but the skin irritation is still prevalent since the treatment. We've given her antihistamine and all the other medication that my vet recommended...nothing is working. She's scratching her skin raw to the point where it won't stop bleeding. She's become very antisocial and aggressive towards me and just lays under the treadmill all day. She eats normally however but isn't herself otherwise. We have another cat which is also a Persian and he is fine. I don't know what to do...