I had some, one in particular that wanted to stay in one of the nest boxes. My nests are large enough for a milk crate so I put milk crates in the nest boxes at night and took them out in the morning. She finally got the idea. Also I put a brick in and she wouldn't lay in a nest with a brick in it either. After the milk crates she was good for awhile then decided to sleep in the nests again, that is when I started putting bricks in. She doesn't even try any more.
