I am rather new to keeping chickens. In the picture is one of our hens that is a little "slow". She has always kept to herself and we believe she is blind. Our rooster picks on her terribly. He attacked her and got her eye pretty good right before I took this picture when I noticed her doing this weird stretch and gape thing. I highly doubt it is gape worm as she doesn't leave the coop and has to be directed to her food because she cannot see her dish. Any idea what could cause this? As a side note she has a seperate pen where we keep her now so that the rooster doesn't hurt her.