The arctic wolves must hunt together in packs when seeking large prey.In the summer they eat lemmings, birds, arctic hares also they sometimes catch fish. The cubs catch insects, ground squirrels and other small animals. Sometimes full grown wolves will attack musk oxen. When this happens the musk oxen will form a circle around the younger ones and when a wolf attacks a bull will charge and toss the wolf up in the air and trample it under its hooves. They also eat elk mountain sheep and sometimes they eat berries.