I am going to be building a dozen nest boxes for our 30-40 hens and will be doing 6 on top, 6 on bottom to save some space, or is it really better to have them all at one level? If I do the 6 up, 6 down version, I want to be able to harvest the eggs from my indoor storage area and not have to enter the coop itself to pick up the eggs. I was thinking of ways to do the wall behind the next (on the people side of the wall). I was thinking that may some cheap louver closet doors would be good (and quick to open and close to pick up the eggss) and also provide a little ventilation. Any ideas?