I hope someone can help me. My boxer has had a skin problem for a while now he has been itching and a little red in the feet and ears. I switched his food to an "allergy" food duck and potatoes and now he is TERRIBLE. I don't know if it is the food or something else. His feet, ears, belly are red, his eyes are swollen and on his belly by his thing there are red round circles that look like they are raw. The vet is not open today. He seems to be okay I have given him benadryl twice so far and he seems to be okay... has this ever happened to anyone else before?