> increasing that percentage but the cycle rate for these hens in intensive farms is pretty regular already (<18 months) so I doubt they'd invest in the additional hatchery facilities for a temporary population lull.

this actually speaks to my point more than the other replies you (and other) gave. A temporary shed for layers to nest isn't insurmountable. Especially if you know that the end result is more money for you because of supply issues.

What i am not sure about, is why that didn't happen, since you say it did not. anyhow, it was just an idle thought. If i was selling eggs, and suddenly a quarter of my flock was wiped out - by a fox or something - i would probably immediately borrow a rooster and let the layers nest. I've done it before, so i'm not just "guessing." Contemplating protecting nesting chickens is the only thing that gives me pause, as i don't really like "outside dogs", but i have a herding dog.