Enzo, the Italian boy, remarks to Denny that “the car goes where your eyes go,” a comment which is significant since it is what Denny would often say to his dog Enzo prior to his demise. The implication is that Enzo the dog, who had always nurtured the fond hope of being re-incarnated as a human, had achieved his wish, manifesting once again in Enzo the boy. Enzo the dog had been of the belief that in order to make sure he was re-incarnated, he would have to “prepare,” to learn as much as he could about being human during his dog’s life so that he would be ready to be born again as a human.
This he certainly did, learning through his owners some of humanity’s best aspects such as romance, child-raising, and the laws that humans operate to protect the most vulnerable in their societies. He also experiences worse aspects of humanity, the jealousy of Annika, and the mistrust of Denny’s grandparents, yet he demonstrates the doggish virtues of loyalty and compassion for his owner all through his life and is thus well enough prepared on the event of his death to become human.