I have been using Royal Canine Yorkie food for my two yorkies. My girl yorkie Roxy seems to do just fine with it, but my boy yorkie Dinky seems to itch all over.

At first I thought it was just allergies and even gave him medicine and it didn't go away, could the food be causing this? I bought Eukanuba yorkie food today hoping that it will help with the itching. Does anyone one have an suggestions for me? I just want to make sure that they eat a good food, but at the same time I feel so sorry for him because he is always itching