I have been keeping chickens for 10 years now and I have always pondered this. We generally keep 12 to 18 chickens and have always had 6 nest boxes. They use 2. It never fails. They also climb in them together even though there are 5 empty ones. When I go to gather eggs, inevitably they are all in just one or two nest boxes. So now that we are trying to finalize our new coop plans I got to thinking. One, do you really need so many nest boxes and two, do you really need dividers between them? We will be building a 6x6 coop and it will have exterior nest boxes along one wall. We were going to put in 4 nest boxes that are 15x15. But then my husband said why bother putting in dividers, just make one long box. However, I have never seen this done so I am wondering would it work? Is there a specific reason that there are dividers between nest boxes? If they are going to squish themselves two at a time into one, perhaps I should just let it all open. Or maybe they are too big and should be 12" wide by 15" deep. Any suggestions? It isn't easy trying to outfox a chicken.