My nest boxes are milk crates and baskets. I hired a handyman to convert half of my 8'x12' shed into a coop and he build a wide shelf about 30" off the floor, with two ladders up to the shelf. My seven hens roost and sleep on one end. There are two milk crates, one on its side and the other open-end up, both filled with pine shavings, on the other end. I added a large garden basket on top of the crate that sits on its side. Because it is wedged into the corner it is stable enough for my heaviest BO to hop into and turn around in. "The girls" happily lay in all three nests, but they do tend to roost on and poop in the crate that is open-end up. I'm thinking of turning it on its side like the other one.