I have 3 chickens that are all laying nicely. Their coop has 2 nesting boxes side by side. However, they all three use just one of them. Sometimes I'll look in and there will be 2 hens stuffed into one box. What is their problem? Can I make the other box more enticing or just live with it? I plan on getting 3 more chickens. Should I add more nesting boxes? It is going to get crowded in there with 3 hens using one box.