I have 12, 8 week old chickens and 2 adult chickens left from my last flock. I have been very careful to keep them separate. I divide the coop with chicken wire and made a separate run for the babies. As the babies have gotten older they have learned to escape their run and i have found them with the the older birds on several occasions. at first the older birds pecked at them to get out of their way but now it seems they just ignore them. I have started to free range everyone over the last week and there has been no problems. Today the big birds were even sleeping with the babies during an afternoon nap (granted on opposite sides of a shaded area). My question is if i continue to free range can i open the coop for all to run and have fun if the older birds are seeming to be tolerant? They have been around each other for 5 weeks now.