Reference: "How Dogs Came To The Indians"

An evil Windigo spirit came to the lodge of the giant and told the two men
that the giant had other men hidden away in the forest because he like to
eat them. The Windigo pretended to be a friend, but he was the one who
wanted the men because he was an eater of people. The Windigo became
very angry when the giant would not give him the two men, and finally the
giant became angry too. He took a big stick and turned over a big bowl with
it.

A strange animal which the Indians had never seen before lay on the floor,
looking up at them. It looked like a wolf to them, but the giant called the
animal 'Dog.' The giant told him to kill the evil Windigo spirit. The beast
sprang to its feet, shook himself, and started to grow, and grow, and grow.
The more he shook himself, the more he grew and the fiercer he became. He
sprang at the Windigo and killed him; then the dog grew smaller and
smaller and crept under the bowl.

- "How Dogs Came To The Indians" (Samoyed.org)