My Blackstone, 17 months old, neutered indoor outdoor cat has a rash/sores on his face and the backs of his ears. He has had this all Summer. I didn't notice it in cold weather. My vet has done a fungal culture which was not definitive and a skin scraping, which was negative. He has had 2 rounds of antibiotics and is currently on Prednisolone and Micazole Lotion. Nothing is having any effect. The lotion makes him whine and does no good. He does not seem to be itching or in pain, unless I put the lotion on him. I am wondering if any other people have seen this and have suggestions. My vets are top of the line and have not seen it. I am worried sick about my baby boy. There are 4 other cats in the household, including his litter mate and they are fine. Any advice would be appreciated.