this pullet sits with her neck arched slowly dropping down about three inches and then lifts it back up. No bite marks or evidence of anything breaking the skin. Eyes wide open.In the first photo is the head normal position, the second is lowered some, and the third is all the way down. After that it goes back up to the first photo. This goes on all day long and it takes about 5-10 seconds for it to transpire. I've searched this and other forums with no luck. I raise chicken, guineas, turkeys, and peafowl.