I just want to thank you for your advice. I have taken the nesting box away. I think the biggest mistake I made, is to scratch her head a lot, as she loves it. She also holds her beak against my chin when I do that. It is such a habit, but I will limited it. But she is a very pushy hen, when she wants her head scratch. I will do my best. I have shorted their day time, sleeping time now is from 6 pm to 6 am. Thanks again.