Here's what Slanker's says: "Pastured pigs are fed grain, grain
by products, stale bread, and other foreign foods and that makes
the resulting meat products only slightly better than
conventional store-bought pork. The idea that pigs must be fed
grain is preposterous and ignorant. "Our pigs range at large
foraging for their natural food. They graze grass just like
cattle. Most of what they eat is grass, forbes, and leaves of
trees. But they also eat grubs, roots, acorns, berries, fruits
(acorns, berries, and fruits are strickly seasonal), eggs,
critters of all kinds, and about anything else they come across
in the pastures and woods where they live. (In fact, their diet
is about the same as a grass-fed chicken!)"