How important is it? And does it vary with breed? Our old flock were production hybrids. They were quite happy with their ground level nest boxes. Our new 6 month old flock, who I'm trying so hard to coax into laying are all heritage breeds (BO, BR, SS, barnvelder, dom). We still have 2 of the old birds but they are moulting right now, and not exactly excited about their new friends, though nobody's getting hurt. Would the floor level nest boxes do anything to keep these girls from laying?