The truffles are collected between mid-September and the end of December. The gatherers – locally called "Trifolau" – collect truffles in the mountains at dusk and in the dark. The Trifolau are helped in their search by trained mixed breed dogs who sniff out the truffles with their especially good sense of smell. Since dogs are used in finding the truffles, we have decided to label the oil as "not vegan".