One of my roos "Rocky" got in a couple of fights the other day. After separating them Rocky seemed injured because he wasn't standing. After inspection his foot looked swollen and started turning black all the way into his nails. I soaked his foot in Epsom salt bath several times. Swelling seemed to be going down but a little drainage from in between his toes started yesterday. Also a couple of his toes looked silver. Today I see inside his toe looks like bone is showing. He's eating and drinking well. I need help on antibiotics to use and do I put him in a sling?