Gestation period is 63 days. Litter size is 12 at the most but usually around 6. Pups are born April-June. Birth weight is 12-13 ounces. Weaning takes approximately 5 weeks.
Sexual maturity takes two years.
Parents first have to eat food first and then pups put their mouths in parent's mouth and then they eat. Although their prey is 3 times their size. Wolf prey includes caribou, white-tailed deer, mule deer, Dall's sheep, bighorn sheep, mountain goat, muskox, elk, bison, moose, small animals, fish, birds, and carrion. Wolves usually attack the old, weak, and the diseased. Wolves are found in similar places as bears.