I recently inherted a cat from my SIL. He is a 1 yr old malee. Neutered/declawd in the front. He has NO fleas, or earmites... and yet he is scratching his neck and head very badly. He has cuts everywhere. I don't know what to do. The vet has checked him for fleas, and mites, but it is continuing to get worse. He also grooms himself to the point of causing bald spots. Is this behavoral? Maybe compulsive?