We have 6 chickens that are 3 months old and 22 chicks that are 1 month. There is a huge difference in size. I have them all out in the coop but the babies are separated off with chicken wire. When they stick their little heads through it to peck at the shavings, our cochin (who is otherwise very gentle) runs to attack them! I'm afraid to let them out....will she kill them or is she just planning to peck them? I can't bring myself to do it to find out.