I've pretty much decided that I will continue to brood the baby chicks on the back porch rather than in the main coop. It's much easier to keep an eye on everything and more readily have frequent contact with them for friendlier chickens later. But to easily integrate them into the flock later on I've decided to move them to a grow out pen rather than just dumping them into the coop with 40 adult chickens and hoping for the best. The brooder will hold them for 5 weeks or so, until they don't need supplemental heat. How long do y'all keep them in grow out pens? I've heard anywhere from 4-6 months, but 6 seems like a long time to me. Is it basically just until they are big enough to protect themselves or do you wait until they are close to laying age? Do you go by the same basic square footage guidelines or can it be smaller since you are housing smaller birds? I plan on adding 20 chicks. My current flock free ranges daylight to dark. When full integration comes, do I just open the doors and let everybody out and see where they roost that night? What other issues should I be thinking about? I'm confident my current main coop can hold the 60 chickens.