The pack tests many animals before finally finding a sick, young, old, wounded or unlucky animal. In a group hunt, wolves can take turns attacking while other wolves catch their breath. The prey animal does not get a chance to rest and quickly tires. Only then will the pack press its attack and make the kill. Even when hunting small deer, several wolves are more effective than a lone wolf.
Group hunting is also important in raising the young.
A litter of four to eight half-grown pups requires a lot of food. This is far more food than the two parents alone can expect to find. But the pack working closely together can provide this food, even while the mother remains close to the den and her pups. Old and sick wolves also benefit from the pack hunt. They may be allowed to remain with the pack in exchange for helping to care for the pups.