This may not help you this round but could be done next time. I run multiple broody hens and sometimes brooder reared broods in parallel. The groups often get into conflicts, especially over roosting sites. To get around that I have started using rabbit cages the birds are moved into as soon as they become mobile. The broody hen groups are contained at night but the brooder reared chicks are kept in the cages for the first week or so around the clock. Either way the birds imprint on the cages and go to them every night. I can move the cages about and the birds will adjust to get into the cages. I have more snakes currently than what is good for young chicks so have taken to try moving roosting chicks up in a concerted manner. I am able to get chicks to roost up consistently by 3 weeks. Hens speed process markedly but even brooder reared chicks are up by three weeks.
Below is a hen with chicks roosting a particular location in a field. Location is elevated cage (48") sitting on top of a pen. Photograph looks like day but actually very close to dark. I may be cheating a little with presence of rooster as it took only one day for birds to learn new location.
The mattress piece provide protection from sun and rain. Hen and brood go into cage on their own. They would not go up yet if cage not already there.
Chicks just shy of three weeks so roosting up a little earlier than average.
Below is a hen with chicks roosting a particular location in a field. Location is elevated cage (48") sitting on top of a pen. Photograph looks like day but actually very close to dark. I may be cheating a little with presence of rooster as it took only one day for birds to learn new location.
The mattress piece provide protection from sun and rain. Hen and brood go into cage on their own. They would not go up yet if cage not already there.
Chicks just shy of three weeks so roosting up a little earlier than average.