Gosh, this kind of stuff just breaks my heart. Poor baby! If I were you, I'd contact Susan Davis from
Holistic Veterinarian Pet Nutritionist Holistic Pet Care - she is an animal nutritionist who works at a Holistic Vet's Office in Cal. but consults nationally over the phone. She has worked miracles - including one for my Marcel. I know she does a lot w/ skin issues and she may be able to help you. I had spent hundreds at the vet, to no avail - found Susan and was not thrilled about spending another $75 for her consult - well, it was the BEST money I EVER spent on my dogs, hands down. Can't say enough about her!