Throughout this book, Buck's character and personality changes. He learns many important life lessons that change him and his outlooks on life. Before you read about how Buck changes throughout the story, you should know a little bit about him.

Buck was four years old. His father- Elmo, was a huge 200 pound St. Bernard dog. Elmo was Judge Miller's dog, and the two were indivisible. His mother - Shep, was a smaller Scotch Shepherd dog. Buck, though he only weighed 140 pounds, felt like the king of the world. A strong-willed and dignified dog, Buck took after his father, following in his footsteps as a loyal companion to Judge Miller. He lived in a beautiful house in the Santa Clara Valley with the large Miller family. He was always taken care of and had no worries. This had been his home for four years- ever since he was born...