Early beginnings for the pups Sköll and Hati. Odin caught them and held them in the kennels in Asgard in order to keep their father and an enemy to the Aesir, Hróðvitnir, at bay. According to Norse folklore, wargs are mythological giant wolves such as Fenrir, Sköll, and Hati.
In the Hervarar saga, King Heidrek is asked by Gestumblindi (Odin),

What is that lamp
which lights up men,

but flame engulfs it,

and wargs grasp after it always?

Heidrek perceives the answer is the Sun, explaining,

She lights up every land and shines over all men, and Skõll and Hati are called wargs.

Those are wolves, one going before the sun, the other after the moon.

Wargs are large, dangerous wolves.

Above: The Trundholm sun chariot from Bronze Age Denmark.

Hati, (meaning hateful) is a large Warg and the son of Hroðvitnir. He desires to ensnare the moon Máni the…