I put pre- painted 1x6 deck boards all around the bottom to help keep predators from prying at the wire there. I have changed the coated 1/2 inch chicken wire out to 1/2 inch hardware cloth that extends 18 inch out. This spring I plan to add a 2 foot extension from that and put crusher run stones all around about 3 inches deep and 3 foot wide to make a nice path and finish off the predator barrier.