One of my POL hens is doing a strange thing I've never seen. I've seen it a few times after she was mated by our young rooster, but a couple times I've seen her do it during feeding frenzy, after being pecked by another bird. Basically, she'll drop her head down and to the side, and walk backwards a couple of feet. Not squatting, she is standing up, but drops her head maybe an inch from the ground and backs up. Is this odd behavior or something that is somewhat normal?