| Quote #4
He flung himself upon another, and at the same time felt teeth sink into his own throat. It was Spitz, treacherously attacking from the side. (3.7)
Buck and Spitz are in some ways different – Spitz is less honorable than Buck.
| Quote #5
Buck staggered over against the sled, exhausted, sobbing for breath, helpless. This was Spitz's opportunity. He sprang upon Buck, and twice his teeth sank into his unresisting foe and ripped and tore the flesh to the bone. (3.19)
Spitz has Buck’s strength, but none of his morality.
| Quote #6
From then on it was war between them. Spitz, as lead-dog and acknowledged master of the team, felt his supremacy threatened by this strange Southland dog. (3.22)
Just as Buck was once leader of his home in the Santa Clara Valley, so Spitz leads the team through the North.