I have 2 buff orpingtons and 2 black australorps that will be 16 weeks old tomorrow, they haven't started laying yet not sure if thats normal or not?? I have 6 other pullets that will be 14 weeks old tomorrow, RIR, BR and a blue copper maran none of them are laying either. My main question is she should I allow them into the nest boxes? I've had them blocked off so that they wouldn't sleep in them etc. Did I mess up by not allowing them acces to the nest boxes? Is that why they haven't started laying yet? I also have a RIR rooster could he be the issue?