I give my chicks opportunity to roost. The chicks all want to roost overnight from 6-7 weeks old. But flock dynamics can do strange things.
A few years ago I had a young pullet that roosted with her momma and two brothers. But after her brothers moved on to a new owner. She got bullied and wasn’t allowed to roost with the adults anymore.
She started to roost in another part of the coop. But she got pestered there too. The nestbox was the only safe place for her. (Edited: I tried to let her sleep with the others by putting her on the roost after it got dark. But it didn’t work out, she only got more traumatised, and decided to let her make her own choises).
She slept in a nestbox until after her first winter.
Janice the pullet who got bullied after her siblings left.
Last year she started to roost again in the part of coop near the nest-boxes and since this autumn (after the big boss vanished) she finally sleeps with the flock and is integrated as a lower flock member.
Now something similar is happening. The broodies with their 3 chicks want to roost with the flock.
practicing during the day
The chicks are 8 weeks now. I’ve seen them try to roost for the night a few times last weeks. But they get bullied untill they give up and leave towards the small coop with the nestboxes. There they cuddle up again and they don’t want to use the roosts in the small coop.

So now I’m brooding on a plan to get them to roost for hygienic reasons.