Mine are using the roost at 8 weeks old now. I would just go in the coop around 10 when they were sleeping and sit each one on it. It took 3 days for all of them to get the idea and now they are on the top roost with the big guys. But I think thats how one of my cuckoo marans hurt her foot. Jumping down or was either pushed off. But she is getting better I have her in a crate in the house for bed rest. They will get the idea sooner or later.