My broody hen hatched out a chick the other day and I decided I was going to buy more for her to adopt. She took them fine and now I have her in a big chicken tractor with 5 chicks. The chicks I bought were 2 weeks old so they're a little bit older than her chick. She took 2 of them fine but she seems to be leaving 2 behind and when I move them over to her she pecks their necks. When she moves away they dont know what to do they just dont move at all. Help!