Our one hen is refusing to leave the nest, every time we go near she screams at us. Yesterday I added a roast to the coup, that is higher than the nest box. She will still not leave the box. Last night she was acting like she was very hot. I put water right in front of her, but she did not go near it while I was there. Do I have something to worry about? Is this brooding? What can I do? We do not have a rooster. I hope that I am doing this right, I am internet changled.