Here is the problem. A chick that hatched on Friday 6 days ago just started doing this on Tuesday. It puts its head back over its neck and swirls its head back and forth from side to side. If I pick it up and look at it it will start to act fine. I put it down and it may even walk and look fine. Then it sits down and does this again. In a previous hatch I had this happen with the same breed, my Light Sussex however that chick started it as soon as it hatched from the egg and it never got better. I finally culled it. I am at a loss as to what this is, any ideas?