I have 14 hens and 5 nesting boxes (made from milk crates layed on their sides.) They have no issus with shared laying schedules. They have been pretty good at spacing their laying out where only a couple lay at once. They do prefer like only 3 of the boxes. When ones done, another will go in and lay in the same box. So they do prefer laying in the same box theres eggs already in, even tho theres 5 to choose from, but theres no fighting. Theyre pretty patient with one another. Even tho they prefer the same 3 boxes, if they have to, they will go to an unoccupied box with no problem.