I went out to this coop this morning to feed, water, and check for eggs, and I noticed that one of my three month old silkies was just laying there. He didn't jump up and come for food. I looked at him and he couldn't hold his head right. He was all off balance and it looked like his head was upside down! He rolled around and flogged and carried on when I sit him down. It sort of looks like his neck is twisted. Could his neck be broken? He has no outward signs of damage - no blood or scratches. I am afraid to put him out of his misery in case it is something that he is going to snap out of. Muscle spams? Cramps? Any ideas?