Mine will crowd in and just park on top of the earlier occupant to lay their egg.My six girls all vie for the same box, and even if I put a fake egg in the other boxes they won’t lay in any box but that one. If it’s occupied by someone they can’t bully out of the way, they will be frantic and pace while singing their egg song, and when they can’t wait any longer they’ll quickly climb into the box (sometimes on top of the other chicken), and will hang their backend off the side and lay in the sand. As long as they’re standing in the box when they lay they’re happy!![]()