Our five girls have been out in the coop since August, and since August have been going to bed all by themselves each night. We had a minor issue with them wanting to pile up in a nest box to sleep for about a month, but since blocking those off, they've been using the roosting bar (which is up at the ceiling) without any trouble. Within the past month, though, our BR has developed a new habit - getting up on top of the coop itself to roost at night. We have no idea where in the world she ever got this idea, but we watched her go up there at night a few times and found her roosting there several times when we got home after dark on a few occasions. On one occasion we found her up there with our BA. Every single time we put her in the coop immediately and shut the door (we manually shut the door every night, even though the coop is in a completely enclosed run). Putting her in the coop didn't help and she kept doing this a few times a week. So I partially hammered in two offset rows of nails along the roof line where she kept going. I sanded the tops to make sure there were no sharp edges - the goal was simply to make it uncomfortable and awkward for her to get up there and roost. While this appears to have prevented regular visits through the day like we used to see, we STILL find her on the coop about once per week! Last night, we found her up there with the BA and the DOM! So how do we get the notion out of her head that rooftop roosting is a good idea and get her consistently back in the coop?