I'm building them a solid plywood nesting box today to upgrade from the carboard box. I notice that two of my four like to lay in the same box, at the same time! It's crowded in a 12x12, but one of them just squeezes in despite the irritated cackling of the other. Because of this, should I just make one long box of 24" or should I keep the 12" spaces? If they lay together, what's the big deal if I take away the dividers?