Hi Marilyn,
I have a wheaten terrier Murphy and he had the worst allergies and yeast too! He was always scratching and chewing on himself. Some of the skin around his tummy was all black! We went to a dermatologist and tried a variety of things, and it would get better for awhile and then come back. I found a product online that really seemed to help. It is called K9 Yeast Defense http://www.askariel.com/yeast-infection-in-dogs-p/102.htm. I was given diet suggestions from AskAriel and I used it with the suggested probiotic. He is so much better and it was the only thing that helped, good luck!
