I have a big rubber loader tire 3' round 2' tall my big lab used it for years you put a pc of pallet on the bottom and a pc of plywood set the loader tire put a pc of plywood on top with a couple cement blocks for roof which I used to full sheet apply wood for an overhang and 2 pallets have a little porch on it they can't chew it and it's very warm for my lab but I build a new building if anybody can use it get back get back with me