My grey somehow injured himself while alone in his cage, we think he might have hit the blunt end on the screw of his feeder, or maybe with a toy. He the area below his eye and it swoll up so that he could not open it. Over the past couple of days it has been getting better and he could open his eye again, but now all of a sudden the area around his eye up to the beak is all greenish-blue. What's happening? Could the wound be infected?