Buck, Spitz, and Thornton were all very determined to accomplish their mission. Whether it was gaining the position of head dog by killing other dogs or saving a dog’s life by risking your life they were all very determined to accomplish their mission.

Buck had just killed Spitz when Francois and Perrault put Sol-leks in place of Spitz as the new lead dog, but Buck wouldn’t let that happen and would move into that place when Francois would try to put Sol-leks there. This is shown by the text,”Buck sprang upon Sol-leks in a fury [...] Go ‘way Hook! He cried, but Buck refused to budge” which shows that he is so determined that he would kill for the job.

Spitz was the lead dog from the beginning and always had kept the group of the dogs in