My chickens are 11 weeks old and the roosting bar was installed 2 weeks ago. I did see one go on it once during the day but they don't sleep on it. The roosting bar is about 15 inches tall and 8 inches from the wall, and it's about 4 feet long. Its a wooden broom handle. 2 of my 5 chickens sleep on the coop door at night when its open, which is only an inch lower than the bar, and I have to move them inside. The other 3, along with the 2 I moved inside, sleep on the ground right by the door. Im concerned I have a problem because I believe they should be using it by now