Santa's Little Helper the dog was a "sympathetic" character. Welker has been praised by staff members for his performances on the show. David Mirkin has noted that "he can do anything, and it fits perfectly. You forget you're listening to a guy, and he's a pleasure to work with." Groening has commented that he was "unbelievably good" at doing animal noises. After 1995, Castellaneta voiced Santa's Little Helper on his own while Welker performed other animal noises until his full departure in 2002, when he was denied a pay raise. In the "questions and answers" section on his website, Welker revealed that the
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