I have a 4 month old springer spaniel. He's up to date on all his shots expect he needs to get his rabies shot within the next few weeks. Lately I've been noticing his biting and licking at his "area" and around his stomach. Upon further inspection I noticed that his area is pinkish in color and there's little red bumps kind of resembling pimples. It's extremely sore to the touch and he's constantly biting, growling and whining at it. I suspected that it might just be a rash and I've been gently cleaning it with a cold rag, but it doesn't seem to be getting any better. Any suggestions on home remedies? Or do you think this is a matter for the vet? Or any idea of what it could be?