At the very least, the writer is a fool for recommending that pigs eat rendered meats. Pigs in the wild eat raw meats not rendered meats. As regards prions , it's been shown that prions are remarkably unaffected by cooking/rendering, so that eating pork from pigs fed on rendered sterilised meats would make no difference, and still give them a good chance of getting BSE, despite the writer's claims. After all, humans get BSE from eating meats too, if from unhealthy grainfed cattle. Pigs, too, are fed on lots of grains.