I have a 800 lb horse that has been limping from a stone briuse for a couple of weeks. My husband cut an opening in the hoof so the infection could drain out and then we applied some onitment that draws out the fluid and we then wrap it with duck tape and change it daily. He is still limping and we thought about giving him some penicillin to help with the infection, but I don't know how much to give. I've experianced a stone briuse on my quarter horse mare and she was well within a week. Anyone have any advice?