I have 6 big girls outside (about a year old) and 4 littles, probably 8 weeks or so. The littles are in the garage in the "Chicken Maximus", a large enclosure made of cardboard with pine chips on the bottom, covered by netting. They have all their feathers, but are still scrawny. I'm afraid the big ones will pick on them, so I think I'll wait a few more weeks to get them out of the garage and into the coop. It is still in the 40s at night and raining all day every day, and I'm afraid the big girls won't let them on the roost. The littles are not friendly enough to catch if I let them outside for the day, so short excursions won't work. I just don't want them to get picked on too bad.