I have a hen and for the last couple of days she's been sitting in the nest boxes all day doing nothing. She appears to be setting but doesn't show other signs of being broody. She won't peck but she'll sing softly when I put my hand near or on her. She sits there all day, I don't know if she lays an egg.. she might, but I felt under her anyway and felt around her back end and couldn't feel anything. Should I worry? She even sleeps in the box at night.