Originally Posted by Surly Chick
It's very cool that you have them trained to lay in the same nest. Easy to collect all the eggs!
They're probably not even trained, actually. Hens just have a natural attraction to any spot that another hen has deemed a good place to lay eggs and will preferentially lay there. That's what "nest eggs" are for--you leave a couple eggs (or something that looks somewhat like an egg) in the nest so the hens will lay there instead of seeking out new and potentially inaccessible places.
Of course, our hens aren't nearly so lady-like as the OP's and scorn this waiting in line stuff. If multiple birds need to lay at the same time, they just pile up in the nest on top of each other. It's a pretty funny thing to watch.