I hatched out seven sebright chicks and 5 favs over the weekend. Two of the sebrights had a wierd thing where they put the top of their head on the ground and kind of spun around on it. To move they flapped their wings which they kept way out from their bodies and kind of paddled backwards using the wings and not the legs. They never sat up like a normal chick, or ate or anything. Normal looking chicks otherwise. Other chicks are all fine. This is a new thing for me. We put them down the second day as it was so sad to watch, but I am looking for thoughts on what the problem is to prevent it in the future. I am thinking neurological issues during their formation.