Allen provided the narration for the 1973 Hanna-Barbera animated film "Charlotte's Web". He was also the voice behind Purina Dog Chow commercials for many years. After moving to Sonoita, Arizona in the early 1990s, he was a viable voice talent almost until his death, recording hundreds of national advertising voice tracks at his favorite Tucson studio, Porter Sound. In his later years he also performed frequently with actor Pedro Gonzalez-Gonzalez. He wrote and sang the theme song for the early 1980s sitcom "Best of the West".