Pigs vs. dogs as truffle-hunters

"According to the few truffle hunters I’ve talked to, sows are actually better truffle hunters than dogs, but dogs can be more easily trained not to eat the truffle they find. Prodan told me the reason for porcine superiority is that the truffle contains the steroidal pheromone androstenone, which also happens to be produced in the saliva of male pigs. Thus, female pigs, particularly when they’re in heat, go hog-wild when they pick up the scent of a truffle."

More at the BBC.