Have an old freezer? Recycle it into a cool doghouse. Its already insulated 2.5 inches thick. Cut your door with a sawsall, this one did not have any seal for the top so I took a old float mattress and used it around the top and for a door, its thick and waterproof. I put carpet around the door to cover the sharp edges. Carpet inside and the food is also inside to keep it dry. to clean it if you are using hay for additional insulation just lift the top. Then to keep it from looking like a freezer by the house I painted it....... total cost ...$0.00 since i had everything already.