Our girls (12 layers) are spoiled with 5 nesting boxes. They have privacy and lots of straw, three of the boxes have fake eggs to help cue them. A couple of weeks ago, they mostly used four of the boxes though they'd still argue a little when a favorite box was occupied. Because the babies in the flock, 2- and 4month olds, were sleeping in the nesting boxes, we made some changes we hoped would discourage that sleeping habit because there was too much poop in the boxes in the morning. The changes didn't work as well as we wanted but it did help some. But the hens have decided they have *one* favorite box and like to argue over it. A lot. They have clean straw, they have the fake eggs and we even added privacy curtains. The one favorite box is only different in that it's a grey plastic milk crate instead of black. What on earth could be the reason for their weirdness? What could we be missing that they want?