How do you get20 week pullets (5 of all different varieties) to accept and integrate with 9 week chicks, one is a BO hen and the other a white Leghorn rooster. Today we put them in the run with the the older ones and the poor buff got pecked on her beak so that there was a bit of blood, and she tried to hide her head in the corner, until the Red Star or the RIR would come along and peck at her again, so she'd squawk and run to another corner. We've let them free range together and they have been chased and pecked at when they are out, but manage to get far enough away. It would be nice if they could roost together at night, they are getting pretty big for their brooder box, although they are very attached to it. Any ideas?