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John and Buck convalesce together, both growing stronger in the beautiful, warm weather.THere is a definite bond that Buck has with John that is unlike any bond he has had with another human. He is full of passionate love for John Thornton, who not only saved him, but is also the ideal master. His dogs are his children. John talks to them for long periods of time. He grasps Buck's head and rests his own upon it. It is almost as if he understand what Buck says to him. But Buck does not seek these tokens of affection. He is content to adore from a distance. At times he does not want to let John out of his sight, fearing that he will lose him as he has lost other masters.