The good homicidal boi himself, Buck In the book, he kills Spitz, but I think in the movie, Spitz just leaves. There are a lot of things, like in the book, when Thorton saves Buck, the dogs fall through the ice on a lake, but in the movie, the dogs just run away. Thorton dies in the movie and book, so they didn't take that away ig
Anyway I drew the final battle with Buck and Spitz, he broke Spitz's legs and he got Spitz off his feet, which then the other dogs finished him off.