My husband and I are new to chickens, we recently moved into a house that came with a chicken coop and run. However we're wondering how exactly our set up works. As you can see there is a shelf/ledge to the left with a metal grate (we're assuming to place nesting boxes on) the shelf has doors in the front (we're thinking to make it easy to clean out waste) and a green mesh curtain (for privacy?). We're wondering if the shelf/ledge is to high to put nesting boxes on and if not should we build nesting boxes with no bottom so that the waste will fall through the grate? (The grate is not big enough to allow an egg to drop through).