The ancients thought truffles were the daughters of lightning. The ancient Greeks and Romans were fascinated by truffles, which they thought had aphrodisiac effect. Rossini, a famous composer and gourmet, praised truffles as Mozart in mushrooms. Truffles used to grow in Italian woodlands, and the best ones were produced in Roero and the edge of Lange hills in Piedmont, Italy. It is also the best wine producing area in Italy. Truffles, especially Perigord truffles, can only be detected by strictly trained sows and dogs. Since ancient times, French chefs have used wild boar to find truffles to meet the needs of nobles. Today, truffle hunters in Italy and France still use trained pigs and hounds to find truffles. The secret is that truffles contain alpha androgen, which is a compound similar to androgen. Some people think that it is this smell that induces female animals to search and makes them mistakenly think that they are tracking the opposite sex partner. Whether this statement is reasonable remains to be studied. Bertolino, a truffle hunter who has lived in Elma for generations, thinks that only female hounds are the best hunters to find truffles. Because pigs especially like truffles. It takes a lot of effort for the hunter to pull the pig back, or he will eat truffles. The hound's strong vigilance will make it notify its owner as soon as it finds truffles. In Italy, training truffle hounds requires a complicated process. First train the dog to pick up the thrown ball, then replace the ball with cheese, and then hide the cheese for the dog to find. Finally, use a small piece of truffle instead of cheese for the dog to find and dig out. The night before looking for truffles, hunters usually don't give hunting dogs food, so hunting dogs will work harder to find truffles in exchange for rewards, such as bread and cheese, which are hunting dogs' favorite foods.