I don't use boxes....I use flat sided buckets hanging on the wall for all of my chickens. I love that I can unsnap them and scrub them out. And if I have a broody, and decide to let her set, then I can just unsnap the bucket and move the entire thing to a safe pen for momma and futire chicks. Last time I moved everything at night while momma hen was still sittin on the nest.