I am really sorry for the late response. I didn't see you posted the medicines and the pictures. Basically, I strongly suspect this dog has allergy. But allergic to what. I don't know.(may be food) When you are using the low allergenic diet, you have to stop all the treats or table food. Otherwise the diet won't make any good. If this is my case, I will try some steroid and see whether the skin will get better.