Miss Piper suffers from allergies. The vet said white dogs are prone to them. We have already switched to grain free dog food, which helped her stool, but her skin is irriatated still. Any ideas of what else it could be? Her skin get's brown areas all on it including her belly. She'll constantly chew her paws which also will be brown and red. I would take pictures, but I just gave her a bath so right now her skin is fine.