I have a weird question about one of my roosters... He just started this thing with bobbing his head from side to side. He's not really shaking it as if shaking something off. The only way I can describe it is like the "attitude" head bobbing. Does that make sense? LOL. It's not forward and back as if he's trying to get something out of his throat - it's side to side. Anybody else notice this as normal behavior or do I need to be concerned?