So I'm in the process of building a night box and wanted to get others opinion on the floor. So do I cover the floor with anything, to protect the plywood if he pee's or poops on it? I was thinking either to use truck bed liner (Rhino Liner) ,but not sure if it will off gas, or just leave the plywood bare and cover with orchid bark. Other ideas are appreciated. The box is 8' X 4' X 3'.