Even if it is a bucolic image, no, in Italy it is forbidden to use the pig, as it damages the ground because it digs holes that are much bigger and deeper than those of dogs. Since 1985 only the dog is allowed, indeed, by law it is mandatory to use a specially trained dog. In France, however, you can go to the search with the pig, but many are still the disadvantages: it is much more difficult to transport it, it gets tired after a short time, it is less obedient than the dog and its main purpose is always to eat the truffle. In addition, by digging furiously with the muzzle, it often ruins the roots of the plants near the truffle, precisely those that with this establish the precious relationships of mycorrhizal symbiosis.