Here's a coupleI wonder how you make a divide for the roost? Can you describe or send a photo? I am having the same issue.
https://www.backyardchickens.com/threads/pecking-order-crazies.1326256/post-21636237
https://www.backyardchickens.com/threads/encouraging-the-flock-in-a-new-coop.1435646/post-23745664