This is called a litter, and the pups in a litter are called litter mates. Pups are born inside a den. A den is sometimes a small cave or a hole dug out of the ground. The den must be big enough for the mother and her pups. It shelters them from the weather and protects the pups from other animals that may want to hurt them.
Packs sometimes use the same den year after year.
At other times, they make or find a new den each year. To Learn more about dens, Click, here . Wolf pups at this age may be preyed upon by Golden Eagles, Bear can also prey on young pups. There are several records of a number of adult wolves decoying bears away from their pups' den until they left. Gestation Period Pups grow inside their mother for about 63 days before being born.