Truffle harvesting in Umbria and in the Norcia area depends on types and seasons. The only months when “quarrying” or searching for truffles is not allowed are May and September.
According to the ancient tradition, a small pig was used for harvesting. The problem of this method is that pigs adore truffles and have to be restrained to prevent them from eating what they find. In addition, it is not very easy to train them.
Today, however, the method is instead to use well-trained dogs. These are not pedigree dogs but usually small crossbreeds.