I went in to check on the chicks this afternoon, and one was lying on the floor. Its crop is empty and its legs just kind of go to the sides of its body. They are not out strait, just hugging the sides. I picked the chicken up, and it moved its legs fine. It just cannot stand with all of its weight. All of the other chicks are fine and quite energetic. Is it just to fat for its legs, or is there something I can do to help it?