Patch has a boo-boo

We told him that if he didn't quit licking it, it would get infected and sure enough, he just couldn't leave it alone. He was very patient with me as I cleaned it up and shaved the area around it and put on a band-aid with Porter's Salve. We're not sure if he got the scratch during a tussle with another dog or if he jumped on something sharp at the dog park. He's got such sensitive skin anyways so a small nick looks like a gouge.