Our chickens are allowed to free range after I get home from work. I leave the coop door open and they put themselves to bed and I shut the door. Recently (in the past week or two) our frazzle hen Fancy stays out all night. I worry about her, but every morning she is waiting outside the coop. What do I do? I dont know where she goes at night, we've looked and never been able to find her. She has always been a loner, sleeps in the corner of the coop on the floor (when in the coop).