My ancona is my only white egg layer - so it's easy to know when she lays an egg. Since she started laying on July 25th, she has laid almost an egg a day - like clockwork - usually between 8:30 and 9:30 each morning. Yesterday, although she sat in the nest box for a long time, she didn't lay an egg - and then she sat in the nest box for a long time again today - but so far, no egg today either. I've read that changing seasons, molting, temperature and lots of other variables determine egg laying. However, I can't think of anything that's different now than it has been the past month. She only started laying a month ago - so it's not time for the 10-week slump I've read about. I have a small coop/pen - and I've checked every inch - no eggs hidden anywhere. And when I let them out to free range for an hour or two each afternoon, I stay with them the entire time (because of predators). It has me puzzled - although I figure it's just one of those things, and when she's ready to lay again, she'll do it. But I thought I'd throw it out there anyway and see if anyone had any insight.