I have a 5 month old english bulldog and he has had diarrhea for the past month and a half due to not transitioning right when he was switched from Eukunuba to california natural. Recently, he started getting little raised pieces on his sides that looked like small bumps and his fur would come out very easily. I was told by the vet to use medicated shampoo and I did. His coat started to look better and shedding stopped, but only for a few weeks, and now I am full circle?? He has absolutely no itching at all and no blood in stool. I bought some allergy shampoo to try today with tea tree oil..is this a good idea?? Any idea what could be going on? Any help is greatly appreciated.