I have an 8x8 coop with a raised nesting box, a ladder to walk up, a gap to fly over to the nesting box, but no dividers in the nesting box. It's nice and dark in there, with no windows, but great ventilation from top. Do I need to have dividers? When do I open it (storing extra straw and feed there, as my flock is 14 weeks old) for business? Thanks!