Unlike hunters, reindeer herders can use deer at any day and hour. Therefore, their existence is ensured more reliably than hunters. To move from hunting to grazing, people had to develop deer management techniques. Some of them were developed back in the period when ancient hunters, following the herds, tried to suspend their movement, keep them near settlements, and drive them to settlements. Most of the techniques were developed anew when people had already become reindeer herders. They had to not only keep deer near them, but also take care of them (feed, protect from predators, promote reproduction). As a result, folk schools of reindeer herding arose, incorporating the experience of hundreds of generations of shepherds who passed on their knowledge from father to son.