I have two hens that I think are broody. They have been sitting in the nesting box all day. The one was sitting on 4 eggs (all of them not hers.) They other one was sitting on just one. Assuming that it was her's. I take the eggs every day. And normaly if someone is in there I wait it out until they finish. These two have been in the boxes all day. The one that I check under tried to peck me and made a sound that was like a growly sound. She would not get out of the box either. I stuck the egg back in the box with her and she rolled the egg back under her and just sat there. I don't have a rooster but my neighbors have 3. It is possible that they can hear them and kicked them in to broodie-ness?