I have a chick that is 4 weeks old and it's feet are turned in. It lays on the ground and scoots around while the other chicks walk on him/her? I took him out and am not sure what's going on. This is the first time I have had chicks. He also spreads is legs front to back like a swimming motion, kinda looks like he is stretching. he looks shaky, and his feet do open but close right back up. Anyone who can help? Thank you very much.