We had a chicken go broody last Saturday. She planted herself in the nesting box and I haven't seen her come out since. My kids said that they've seen her come out a few times for food and water, but she doesn't stay out long.
Last year we got a broody chicken and 5 chicks from a neighbor. We lost all of the chicks to hawks. I contacted her again and asked about getting chicks to put under this bird. She suggested that we just let her hatch fertilized eggs. That sounded like a good idea to me. I went picked up a dozen fertilized eggs tonight. Then I removed the bird from the nest box, put the eggs in, and sat the bird on top of them. Now I just have wait 3 weeks for them to hatch.