Need some help. I have a rooster who has had a very hard life of almost one year. First at six weeks old he broke into a pen with a broody who just hatched. She pecked and scalped him and we found a half dead bird with no skin from his head all down his neck. 6 weeks in recovery he was out with his crew again. Over the winter when we had extremely -32 below for several days he got bad frost bite despite trying to heat in the coop. It all turned black and fell off, seemed fine. Lately he started limping, no apparent injury, both feet look fine. Today he can't stand, falls over, uses his wing to help him. He is eating and drinking find here in the house but can;t stand to do either. He has been vaccinated against Mareks. Any ideas?????