While the storm was going lightly John Thornton was resting with his friend that was taking care of him and Buck, Buck was also sleeping, trying to get beck some strength and energy.
"And as a cat mother cat wishes her kittens, she washed off Buck's wounds". But buck was confused why the black dog wasn't jealous towards him
Buck and Thornton stay together because they have close relationship that they both enjoy. Buck also tries to show his love by shaking him and showing it in adoration.
While Thornton was in the saloon , "buck on his head and paws watching his mater's every move". Watching for any trouble that might arise.
Then Buck saw Thornton get hurt from the window so his whole body got up and ran inside. "The people did not hear a bark or yelp, it was a more of a roar. Then the people saw buck and buck went for Burton's throat.
So then Thornton and Buck left the city with Thornton injured an drained. While buck feels anger toward Burton but love and care for Thornton.