I have a broody hen ,& have ordered hatching eggs for her. Had a nice little brooding box set up for her, that would accomadate baby chicks, but can't get her to stay in it. Put her in it after dark, went to check later, she had joined the other chickens on their roosting bars. This morning she was back in her regular nesting box. Trouble is the nesting boxes are too high off ground. Should we just wait till chicks are hatched, then move them?