Switzer's tenure on Our Gang ended in 1940, when he was twelve. His first role after leaving the series was as co-star in the 1941 comedy Reg'lar Fellers. The next year, he had a supporting role in Mrs. Wiggs of the Cabbage Patch. Switzer continued to appear in films in various supporting roles, including in Johnny Doughboy (1942), Going My Way (1944), and The Great Mike (1944). Switzer had an uncredited role as Auggie in the 1943 film The Human Comedy. Switzer's last starring roles were in a brief series of imitation Bowery Boys movies. He reprised his "Alfalfa" character, complete with comically sour vocals, in PRC's Gas House Kids comedies in 1946 and 1947. By this time Switzer was downplaying his earlier Our Gang work. In his 1946 resume, he referred to the films generically as "M-G-M short product." Switzer had small parts in both the 1946 Christmas film It's a Wonderful Life as Mary Hatch's (Donna Reed) date at a high school dance in the film's beginning and again in the 1948 film On Our Merry Way as the mayor's son, a trumpet player in a fixed musical talent contest. In the 1954 musical film White Christmas, his photo was used to depict "Freckle-Faced Haynes," an army buddy of lead characters Wallace and Davis (played by Bing Crosby and Danny Kaye) who was also the brother of the female leads the Haynes Sisters (played by Rosemary Clooney and Vera-Ellen). In the 1950s, Switzer turned to television. Between 1952 and 1955, he made six appearances on The Roy Rogers Show. He also guest-starred in an episode of the American science fiction anthology series Science Fiction Theatre and The George Burns and Gracie Allen Show. In 1953 and 1954, Switzer co-starred in three William A. Wellman-directed films: Island in the Sky and The High and the Mighty, both starring John Wayne, and Track of the Cat, starring Robert Mitchum. In 1956, he co-starred in The Bowery Boys film Dig That Uranium followed by a bit part as a Hebrew slave in Cecil B. DeMille's The Ten Commandments. Switzer's final film role was in the film drama The Defiant Ones. Besides acting, Switzer bred and trained hunting dogs and guided hunting expeditions. Among his notable clients were Roy Rogers and Dale Evans (Switzer's son's godparents), James Stewart, and Henry Fonda.

Answer this question "What was significant about his adult years?" by extracting the answer from the text above.
Between 1952 and 1955, he made six appearances on The Roy Rogers Show.