Pigs make piglets!

The same quality that makes feral pigs a problem—prodigious fecundity—has delighted farmers. Cows, goats, and sheep provide milk, a bountiful and consistent source of protein. Oxen pull plows and carts, and sheep are shorn for wool. Pigs do not pull plows; they give no milk and grow no wool. Pigs produce only one thing: more pigs. Many, many more pigs.

Mark Essig, Lesser Beasts: A Snout-to-Tail History of the Humble Pig (New York: Basic Books, 2015), Prologue