What was the product Rin Tin Tin became a famous movie star in 1923?

Rin Tin Tin became a famous movie star in 1923 for his role in the silent film "Where the North Begins." The German Shepherd, rescued from a World War I battlefield, captivated audiences with his charm and acting ability. His popularity helped establish the dog as a major star in Hollywood, leading to a series of successful films that showcased his talents. Rin Tin Tin's success marked the beginning of a new era for animal actors in the film industry.