I am a first time chicken owner and I am remodeling an old chicken coop. I added 5 new 12" x 12" nesting boxes. However, I will have at least 20 laying hens (probably 23). Do I need to build a few more boxes??? Thanks! BTW, I love the chicken math thing. I wanted 2 laying hens to see if I wanted to take on this challenge. My wife, kids, parents, niece and nephew had their say......soooooooo, we ended up with 25 day old chicks. Now they are 15 days old and I can't imagine doing it any other way!!!