Hey guys...am heading out tomorrow to buy some lumber to put a coop together with. I need this coop to be about 8x8 for starters ( will inc the size in september when i can afford it...new job) Is regular old non treated 4x2 ok for the frame? Was thinking of using ply wood for the walls and roof. Is non treated ply wood ok if i use wood stain/sealant over the top after its built? is stain/sealant ok with chickens? thanks guys.