How do Francois and Perrault's view about Buck and Spitz differ ?

In Chapter Three, one of the newest dogs, Dolly, becomes mad and attacks Buck. Buck flees and eventually races back, relying on Francois to save him. Francois kills Dolly with an axe, and Buck collapses, exhausted. Spitz takes advantage of this moment of weakness and attacks. He is driven off by Francois who administers a severe lashing. Perrault believes that Spitz is going to kill Buck, but Francois insists that it is Spitz who should be afraid.

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