She came out for food and water this morning then went back and sat in empty box. I moved her to her own pen with two old marked eggs and have enclosed her in the box section. I will leave her enclosed in the box section until later this afternoon and then open her to the cage area where she can come and go. My plan now is to put new eggs under her as the other hen lays and see what happens . We will see if this is just a quirky habit or if she is serious! Moving her caused a stir up of Roota the rooster but he has settled now so hopefully she will too.