Maybe I am being picky, but if you have not nailed down the plywood, I would turn the plywood the other way. Running across the floor joists instead of with them. I would also cut one of the middle 4 x 8 sheets in half and offset them. Too many seams matching up is never a good thing. Just throwing my 2 cents in. Other than that....wow...awesome coop..16 x 16 is huge!