I read on hear that 2 nest boxes would suffice for 6 chickens, so I took 2 of the four out for added space. That was fine when only 2 of six were laying! Now that 4 of six are laying they are really fighting for one of the boxes, ignoring the other. I have a web cam in there so I can see the fights. Our barred rock got ticked off while trying to lay as our white rock tried to barge in on her so she promptly dragged her out buy the scruff of her neck. They wouldn't actually harm one an other over a nest box would they?