My boss and I currently have three feeder pigs (seem to be Yorks or a cross) that are receiving corn and are also free ranging. This is my first extensive exposure to swine (cattle and sheep background) and I am interested in later on raising some free range purebred animals. What breeds or breed subsets do best at minimalizing supplemental feeding while free-ranging? That is, which live most nearly off the land? I would be most interested in raising a less common breed to help it continue, but also make money off the meat while free-ranging in pasture and woods. I'm thinking long term, with the idea of selective breeding and culling towards a very independent but still somewhat manageable line of animals. I'm already trying to do this with my mutt sheep.