So, my four chickens are almost 12 weeks. They have a beautiful coop and run. I've blocked off the nesting boxes for now. But they are not using their roosting ladder. My coop is built from old windows, so they have plenty of light during the day. The only light they have at night is from an old coke machine that glows from the outbuilding window that shines through the coop that is added on to the back. They choose to sleep in a corner huddled together. They use the roost in the coop during the day and they also use the roosts in the run during the day, so I know they know what to do. I've researched roosting and have taken advice to place them on their roost at night, when they've settled down. I went out tonight and did what everyone suggested. They were huddled up in the corner and giving me little disapproving clucks, but they let me place each of them on the roost. It was the funniest thing. They all stayed up there when I was leaving. Wondering if they will be there in the morning. We'll see.