Today as we were heading out for a walk, SIdney, in all his youthful exuberance, veered to far to his left and ended up in a rosebush. He came out of it with the tip of his ear bleeding. My daughter took him inside to clean him up ("uh, Mom? Why are you taking me inside, mom? We are supposed to be going OUT. For a WALK. Uh, Mom???). He did not seem to be bothered by it and the bleeding stopped pretty quickly. You can see a cut about 1/2 inch long and some missing fur. My question is, do we just leave it be, or is there something we should put on it?