I have a year old hen who will not come out of the coop. She sits in a nest box all the time. I have to bring her food to eat otherwise she wont eat. She appears healthy but a little thin. I don't know if she's laying or not. A couple times there was an egg in the nest box but I don't know if it was hers since the other hens use the 3 boxes. I collect all the eggs everyday so I can't tell if this hen is being broody. Any ideas or things I should look for?