Sorry to hear that bro Lorensia, but what you can do right now is to get medicated shampoo to help it heal. If it's not too much trouble try BARF. (look it up on the net) if you still don't know how, i will guide you through pm, because i don't want people here to scold me for making this thread into a Dog Disease thread.
Don't worry, you will find the root of the problem and to help your pooch.