If you could get a picture of his legs from the front or back that might be helpful. Also look along his leg for any green bruises, redness, or swelling of the foot or knee. I would keep him safe in a dog crate with food and water. B complex tablet 1/2 tablet daily crushed into his food or a little water may help. It could take a few weeks for his leg to heal. But don’t let another rooster near him.