As the dogs chased the rabbit to see who would get to kill it first, Buck who had been leading, saw that Spitz found a short cut and got to it first.
When Spitz killed the rabbit Buck had been enraged and wanted to fight Spitz once and for all and thought that whoever won should be the leader.
They battled and battled gave each other scars and fought well but at the end of the day there can only be one winner.
Spitz had fallen and when fighting a dog this is the worst mistake someone can do because once you are down, you are never coming back up.
As the other dogs had been finishing off Spitz Buck had been looking on thinking about how he finally killed Spitz.
Because Buck had beat Spitz and killed him he thought he deserved to be the leader because that seemed fair, but nothing in life is fair and just because he won one battle, it does not mean that there aren't more to come because in life all you can do is survive.