It's common knowledge that if you want to find a truffle, you'd do well to find a pig first. Truffle hogs have been used for centuries to sniff out the prized fungus, which is often valued at thousands of dollars per pound. In recent decades, however, truffle farmers have increasingly preferred dogs to pigs as companions. Why? Because dogs have more stamina, are easier to train, and are less likely to attempt to eat a truffle when they find one. Modern Farmer has taken a look at a truffle farmer in Oregon who makes a living from his hounds, examining what goes into training a good truffler.