Według Wikipedii:
"The most significant is that the survival of the dogs at the end of the film seems very unlikely; the book as originally submitted to the publisher concluded similarly, but in all known editions, the pair is rescued and returned to Snitter's original owner, who in the book has survived. Other differences are linked to the alteration of certain characters and to an overall compression of the time sequences and series of events outlined in the book."

O, dziękuję! Nie wiem czemu wtedy nie weszłam na wikipedię... xD''