Everything I read says to put the roosting bar above the height of the nest boxes, so the ladies won't sleep (& poop!) in their nest boxes. But I wonder, does that mean above the top of the nest boxes, or just above the part they hop onto to jump into the nest boxes? So if the bottoms of my nest boxes are 2' off the floor, and the nest boxes are about 1-1/2' high, should the roosting bar be over 3-1/2' off the floor, or does it just need to be above 2'? My birds are going to be big & heavy, so I want to make sure they can get up to the roosting bar! Thanks - stressing out because the chicks are more like chickens now (6 weeks), and the coop isn't done!!