Can ANYONE Identify what this could be? Started out about nickel sized and flat Treated him for Lice & mites. This just keeps growing now he is having problems with equilibrium... but he eats and drinks good. I have treated him with Duramycin a couple of times since June & also Ivermectin for lice/mites . I even tried pure olive oil poured directly on this to help soften for removal to NO Avail. Him and another rooster fought and the other Rooster caused this to start bleeding where it is attached to his skin. I treated him with Stiptic Powder to stop the Bleeding Successfully and pulled the other rooster so no more damage/harm to him. I am at my wits end here??? Please Help? This is hard as a bone and it also goes across his neck? It protrudes 3" or more from the side of his head.