I had heard of 'green roofs'—roofs that are designed to grow vegetation—on homes, but I had never before seen them on doghouses. Sustainable Pet Design's custom-built doghouses have green roofs which provide insulation, filter runoff water and dust while looking and smelling great. The doghouses are built to order to properly fit your dog and include the buyer's choice of style, color and plant type. Construction is done by hand using non-toxic materials. Sustainable Pet's online ordering system is being updated but interested parties are encouraged to contact the company directly.