My late September chicks will be 15 weeks old tomorrow. The Welsummer pullet has always been friendly and allowed herself to be petted and picked up, but the others have been more standoffish. In the last couple of days, one of the Easter Eggers has started squatting and spreading her wings slightly when I reach out to pet her. She even allowed me to pick her up this morning, which she has never done before. Does this mean she is getting close to laying? I still have the nest boxes in my coop blocked off. Should I open them up and risk the chickens sleeping in them (they're still sleeping in a pile, although they roost during the day for naps)?