Went out to feed the horses a few minutes ago and heard my Silkie roosters on one of my hens. Looked inside and told him to knock it off, when he wandered off the hen kind of tucked her head and started rolling back and forth. By the time I got the stall door open and got in there she was just laying on her back! I grabbed a brooder box, brought her up to the house, and gave her food and water. She seems alert and she's eating and drinking but still seems kind of odd... She almost seems as if she can't see or something the way she's got her head so close to the food and water before she pecks at it... I'm struggling to describe it but If I was to describe something similar in a horse I'd say almost a little neurologic? Everyone else in the pen (there are 6 other chickens in her pen) seem absolutely normal. Any ideas? How would you handle/treat?