We've been having a problem
lately with our chickens roosting in the nest box.
I think they like to sit on
something they can crouch down on to keep warm in the Winter months,
which is why we installed the shelf above their nesting box.
We also blocked up some of
the holes for a more closed in area.
From the picture it looks like there is a lot of daylight shining through. Maybe this is intended, or maybe for the winter it could be tightened up for the hens. I just wrapped my chicken coop with black plastic to ward off some of the cold and winter winds.
Now you just to develop a Poop-free chicken shelf! :o)
i use about 2 inch diameter tree branches for roosts chickens like something then can wrap their toes around at night installed higher than the nest boxes keeps them out of the nests at night