I noticed yesterday morning he came in whinning and limping on his front foot. It seem to get better as the day went on but this morning he was still kind of limping but not bad. He still runs around and plays with the other dog like always. he's 9 week old. I think he and the other pup was playing alittle rough and maybe pulled or sprained a muscle. Is there anything like childern asprin that I can give him?