The muscle and flesh is the last portion of the prey that is eaten, in contras with human habits. After the prey is consumed, little remains at the killing site. The first wolf to return to Sweden after the extermination of its wolf population regularly brought down large moose by itself. There is evidence that wolves have some knowledge of proper prey management. L. David Mech found one pack in Minnesota that varied its killing by hunting in a different part of its territory each year, allowing prey numbers elsewhere to recover, aiding the long-term survival of the pack.
Wolves hunt out the weak, the sick, the old, and the injured.
They help the population of prey animals like the elk, deer, moose, and caribou, by taking away the weak and letting the strong survive. This is important part in the ecological system. By enhancing the strength into the herds. Without animals like the wolf to eliminate the weak, old , sick and injured, the herd of deer would swelter. They would become so numerous that they would starve to death.