Digging for truffles is like digging for buried treasure: a good haul can earn you a pretty penny and the activity can attract a rogues' gallery of characters keen to keep the booty for themselves. Rather than relying on competitive (and sometimes dangerous) foraging, Australia is a world-leader in truffle farming. But growing these fickle fungi is a years-long endeavour, and harvesting them requires the assistance of a four-legged friend.