I have 8 laying hens, and 2 boxes. It seems to be enough for them, but I think they only like one of them. Many times have I encountered 2 birds sitting on each other laying. Of course, my first thought is, "The other box must be in use." But when I look: nothing. They are willing to lay eggs cramped up together, but not go to the other box. It is always the box on the left that they prefer. People ask me why I have chickens. It's not the eggs, it's not the calmness that they bring me- plain and simple, they are funny.