I ordered an amish 4x6 board and batten coop that's raised. I want to enclose the area under the coop and make a 4dx8lx4h run. I don't have much in terms of time, experience or equipment. Does anyone have plans and a shopping list of the required materials? I basically want an rectangle with the end covered for shade. Do I need pressure treated wood just for the bottom? I would really appreciate any suggestions.