I was cleaning one of my chicken pens today when 3 of my hens wanted in (they were outside today) and 1 of them went straight to a nest box. The two others were doing their own thing ( which included messing up the piles of old hay and poop that I had made so I could bucket them and take them outside). One of the hens digging at my piles decided to join the laying hen in the nest box, as soon as the hen(Red) laid an egg, the other one pushed Red and got on the egg. Red left to go outside and the other 2 did the same when they got done. Well the nesting box is actually an old rabbit hutch that's in the pen for new chickens to get used to the main flock, but seeing that I have no new chickens at the moment, I leave it open and the hens lay eggs in it.