My hubby is building a new coop with 3 sections. 4x5, 4x6, 4x5 plus an area in the back for feed, egg bins on both ends and the center coop will have the egg bins inside. It will have a roof in front for shade and 3 outside pens in front. My question is it better to raise the coop for the chickens to go under or leave it on the ground? Could there be additional problems with predators or harder to keep clean, etc. Just asking for experience out there? Thank you.