[EnjoyingLife]

Via: http://en.wikipedia.org/wiki/Tuber_%28genus%29

White truffle

. . . The Tuber magnatum [White truffle, Alba truffle] truffles sell between 200€ and 400€ per hectogram ($1000 - $2000 per pound). They produce a scent that mimics a male pig sex hormone, and for this reason, female pigs have been used historically in Europe to help find truffles. However, more recently, dogs have become preferred for truffle hunting since they can be trained to just find the truffles whereas sows eat the truffles as soon as they find them. . . .

[Cobra64]

However, more recently, dogs have become preferred for truffle hunting since they can be trained to just find the truffles...

Tennessee truffel sniffers.