Considering raising meat chickens, but would like to have them hatch chicks before the slaughter so I don't have to buy new chicks every time. My question is how exactly do they lay and sit on their eggs? Well, I know how they do that, but how many eggs will a hen sit on, and do they stop laying once they-start sitting? Will they sit on each other's eggs? Will some sit and some refuse? Where can I find answers to these questions?