My 5 chicks are 6 weeks old. They have all their feathers and are healthy. They live in a safe coop and it has a roost bar about 18 inches off the ground... I don't have a lamp in the coop and I don't have heat. I am south of San Francisco and the weather is high 60s-70's at this point.
Problem is, at night they all come in the coop and huddle together in the shavings in the corner. They CAN get on the roost bar. I have seen them on it in the morning... but they look so darn pathetic at 8pm just shoved in the corner.