Even if you aren't using one of our popular doghouses, you can still enjoy our chew-proof dog door on your Igloo doghouse. Called the Igloo Door, this dog door is the best on the market. It's manufactured using American-made materials in the heart of America. Featuring a 6" rain shield, it keeps the rain outside of the doghouse, while other pet doors allow rain to run down the surface to the inside. The weight of the flap helps to minimize flapping during wind; it is also amazingly quiet. And best of all, its durable, heavy-duty design keeps your dog from chewing it and his doghouse to pieces, ensuring he won't ingest anything he shouldn't while keeping a roof over his head.