Definitely. We were raising pigs for years breofe the whey became available. We just started getting whey in July of 2006 so it hasn't been a full year yet. There are other sources of excess dairy as milk and cheese plus we had years when we raised the pigs on nothing but pasture. It takes more pasture per pig if we don't have the supplemental feed of the way, but they can be completely pastured and then in the winter fed hay. People don't think of pigs as hay eaters, but you and I eat salad too and can be vegan if we must.