Some people spin the undercoat of the Newfoundland dog into yarn. I think I've heard of poodle fur yarn, too, but I'm not sure of that one. I used to spin yarn a bit. Nothing exotic though. Just regular old sheep wool. But because of my spinning experience, I find myself twisting all kinds of strange things into strands. Like the paper tubes that drinking straws come in and things like that. It's a difficult habit to break. (Not that I've really tried ;-)