I have a gelding that somehow, and we have searched to find out where, got a gash about 3 inches long on his left rear leg. It was pretty deep and bled pretty good. I put a compression bandage on it and over the gauze to stop the bleeding and close the wound. I have been treating it with Underwoood but no matter what I do the wound keeps opening or rather even if it starts to scab, the location of the wound is just right for him to reach and lick or rub. He won't leave it along. Any suggestions!