One of my hens appears to be broody. We were out of town for a few days, and when we got home yesterday she was sitting in her nest, and, so far as I know, hasn't got up since (though I assume she is getting food and water, I haven't seen her do so). My neighbour who cares for the animals when we are away collected an egg from Beatrix on Monday, so this behavior is very new. I'm inclined to let her continue, just to see if she takes it to its conclusion. However, this hasn't happened before in my little flock so I would appreciate advice. How does this usually progress? And when do I start counting the days? Thanks.

She was sitting tight on her nest when we got home from our trip a week ago Tuesday, so I figured she had at least one or two under her then. And I gave her the fresh eggs from her EE sister over the next 2 days, and thought that she was probably also laying an egg a day. So, 2 donations, 3 or 4 of her own. And then I brought 4 refrigerated eggs up to room temp., and gave them to her as well - maybe they will hatch, maybe they won't, but its worth a try. So, 6 given her by me, plus all the many that she laid herself ... or maybe not. I collected 6 (six) eggs this evening - the 2 that I gave her from her sister, plus the 4 out of the refrigerator - and that was all!!! She was sitting on air when I first noticed her not leaving the nest! Had I not *donated to the cause* she would still be sitting on air! Silly bird! Well, anyway, now she is in her safe haven, with 6 eggs under her, 2 of which should hatch if she stays the course, and the other 4 might. I guess I need to re-evaluate the expected hatching date. And it looks as though I needn't be concerned about having to deal with meat birds quite yet.
(Unless the 2 are roosters :/)