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
Media in The Simpsons this mocks "how many children's programs have become little more than the ad to the merchandise". Gray also writes that "The Simpsons" "illustrates how the ad as genre has itself already invaded many, if not all, genres. Ads and marketing do not limit themselves to the space between programs; rather, they are themselves textual invaders, and part of "The Simpsons" parodic attack on ads involves revealing their hiding places in other texts." "The Itchy & Scratchy Show" is a show within a show that appears occasionally in episodes of "The Simpsons". They typically appear in the form of 15-60 second