Right behind his ear. Ewww, its nasty. I cannot believe it, he has never had one before. I ended up shaving it so I could get medicine to it and where it can breathe. Now my poor boy has an ugly bald spot. Any pointers on dealing with hot spots? At work (I'm a dog groomer) we shave the area and put our all natural hot spot foam on it. and of course advise a vet visit, or a close watch on it.