Just finishing up the nesting boxes to add to our chicken coop. We have 3 Buff Orpingtons and 2 White Plymouth Rock that are 12 weeks old. DH built a nesting box (with2 boxes) that will be attached to the side of our coop. He will be cutting out the side and attaching this along with a flip top for gathering eggs. Should there be venting in the boxes or windows, or do the girls like that area darker? I figured 2 boxes would be more then enough for 5 birds. We had gotten more chicks then intended (you know....chicken math) and realized since they are getting so big, that it would be better to 'remodel', if you will, & add an addition to the coop instead of craming the 5 girls plus the nesting boxes in the original coop. Any ideas or input???:/