One of my girls has decided she wants to sit on all the eggs. I have two nest boxes but the use the same one. Yesterday, one of them decided she would sit on 4 eggs. We let her do this for about 2 hours, then my daughter went over and took them but replaced them with some golf balls. She was not a happy camper at all! Does this mean she is going broody? They have only been laying for about 3 weeks.