I believe this to be spot on as my experience has been the same. Yet almost universally, the suggested nest box construction shows rather open nest boxes with practically the bare minimum lips on the front.. can you tell me why this is so? I have noticed the hens seem to really like nests with high lips they have to high step over and affords them a chance to 'hunch down out of sight' once they are settled down on the nest. I use covered cat litter boxes for this reason and for ease for moving broody hens to isolation pens. High lips, high privacy. Never have floor layers in pens with those things.