I work at a petstore and did you notice a change when you started the food he's on? There are also anti itch spray you can give also avoid bathing as it does make the skin dryer. You should only be bathing your dogs once every two months or so. The oatmeal is good the bathing is just something that's not going to do a great job with it. Like I said go to a local pet store and buying anti-itch spray. It will help sooth rather then dry. Also if it's the food find something with a very limited ingredient diet. Blue is good, but it does have high ingredients that can effect your dogs skin.