In Call of the Wild, what did Buck first learn to do to avoid being hungry?

After Buck is stolen and taken to the Klondike in Jack
London's Call of the Wild, he is forced to adapt to many cruelties
which he had never experienced before. In addition to learning about the Law of the
Club--the way men beat their dogs to gain obedience--Buck must adapt to the Law of the
Fang--the way in which other dogs take advantage of their mates. He watches the amiable
Curly torn apart and killed by the other dogs, but he also learns to bury himself in the
snow in order to keep warm in the sub-zero temperatures. As for food, Buck learns to eat
quickly so it is not stolen by other dogs, and he learns how to steal food without being
caught and beaten by his masters.