Santa's Little Helper of their sacrifices and starts treating him badly, causing him to run away. He ends up in the possession of Mr. Burns, who trains him to become a vicious attack dog. Several days later, Bart stumbles upon the trained Santa's Little Helper and is attacked, but the greyhound eventually recognizes his old friend and stops. In "The Canine Mutiny" (season eight, 1997), Bart uses a fake charge card to buy a well-trained rough collie named Laddie from a mail-order catalog. Laddie learns many tricks that Santa's Little Helper is completely unable to perform, and the Simpson family nearly forgets about
The Simpsons episode guides the 2003 episode "Today I Am a Clown", where Lisa uses it to remind Homer that Santa's Little Helper was supposedly neutered in a previous episode (specifically, "Two Dozen and One Greyhounds"). The guide provides an episode-by-episode history of the first eight seasons of "The Simpsons". Each episode is covered in either one or two pages, featuring a synopsis, credits, pictures, and memorable quotes, as well as the episode's chalkboard gag. Obscure or hidden jokes are also brought to attention. The episodes are arranged in chronological order, and at the beginning of each season are two-page special features, such as