Some people trapped wolf to prevent them killing cattle and sheep. They shot them to catch them. They live in groups that are called packs. They have members of 5 to 9. The male and female leaders are called alphas. Wolfs hunt deer, elk, moose, and other animals. Pack members use the position of their ears, mouths, and tails to communicate. They also use barks, whimpers, and howls. Wolves smell and lick each other, too. They have a good sets of smell. The pups nurse for almost 2 months. Then they enjoy warm meals that their parents regurgitate for them.