Santa's Little Helper and is the center of the plots of several episodes. During the course of the show, he has fathered litters of puppies, passed obedience school, had surgery for bloat, replaced Duffman as the mascot for Duff Beer, and been trained as a police dog at Springfield's Animal Police Academy. Some of the episodes that focus on Santa's Little Helper have been inspired by popular culture or real experiences that staff members of the show have gone through. Although cartoon animals are often anthropomorphized, Santa's Little Helper generally exhibits canine behavior. Cast member Dan Castellaneta currently provides the dog's sounds on
Helper (Subud) by their fellow members. One becomes a helper by asking the helpers to "test", or receive, whether the person has the capacity to fulfill the helper job at that point in time. That is, the helpers make a decision based on what they receive in their testing, and with as little mental thought and personal opinion as is humanly possible. A focus of criticism is the role some helpers adopt as spiritual and personal counselors. Their ability and understanding apparently vary considerably. Reviewing the internet one can see a whole variety of balanced and not so balanced opinions of helpers.