Walter free-feeds his pigs whey, a cheese-making by-product, and has pictures of semi-truck loads of butter, cheese, sour cream and other dairy products that he???s unloading with a forklift on his blog, like this one:http://flashweb.com/blog/2009/05/800-lbs-of-butter-30000-lbs-of-cheese.htmlAsk yourself how many tons of hay would be required to replace the calories in 800lbs of butter, or 30,000l