I like the posts that keep close to mother nature! If they are too big to fit under their ma, they should be fine alone. I put some 7wk olds out last week I checked on them all the time. They got real happy real fast. Leaping & playing. I have good henhouse w/plenty of hay around. Another bunch in inside still, I have no warm light on them now. They are 6wks. I want them to get used to cooler temps. But is not really cold since it is inside our house. I transfer them to a wire cage in henhouse for a few days, then leave the cage door open. All the feathers get along ok. A little bit of bossiness at first.