what effects does buck becoming leader have on the team?

Buck excels at leading, whipping the rest of the team into shape. Buck forcesPike to carry his share of the load, and he soundly punishesJoe for his bad behavior. At the Pink Rapids, they pick up two new dogs, Teek and Koona, and Francois is astounded by how quickly Buck breaks them. They make record time back to their starting point, and the whole team struts proudly through the town. After receiving their orders, Francois andPerrault leave the team in the care of officials, a "Scotch half-breed," and pass out of Buck's life for good.