I really thought I'd notice if this was going on. I was a bit shocked to find this chicken sitting on 15 eggs, hidden under the pumpkin vines. She's been escaping every day, which was annoying, I just thought she'd figured out how to get out, and so she kept repeating it because it was fun. We've attempted to block the gap in the fencing, but she was determined. One egg per day for 15 days. Today was the day to start sitting on them, and that's how I found her, hadn't seen her since this morning.