The origin of Snoopy depicted in this special contradicts the canonical version of how the beagle came to be, whereas Snoopy Come Home (1972) followed the comic-strip's mythos more closely. The main differences: In this special, Charlie Brown, at his current age, wanted a dog to greet him when coming home from school, thus going to buy Snoopy on his own. Originally, when Charlie Brown was 3 years old, his parents bought Snoopy for him after a bad day at a playground, when a big kid poured sand on him and made him cry. Here, Sally is her current age when Snoopy was bought. Originally, Snoopy was bought before she was born. -Originally, Lila and her family were forced to return Snoopy, because they moved into a new apartment where no dogs were allowed. Here, they lived in the same apartment, which had a new rule in which no dogs were allowed.