Rowlf the Dog character jug produced in Korea by Sigma The Tastesetter of Garden City, New York, circa 1990. Rowlf the Dog is a Muppet character, a scruffy brown dog of indeterminate breed with a rounded black nose and long floppy ears. Rowlf was introduced in 1962 for Purina Dog Chow TV commercials aired in Canada, in which he appeared with Baskerville the Hound. Rowlf rose to popularity as Jimmy Dean's sidekick on The Jimmy Dean Show in the 1960s. He was the first Muppet with a regular spot on network television. Rowlf then became Muppet Theatre's resident pianist on The Muppet Show, as well as one of the show's main cast members. Laid-back and wisecracking, his humor is characterized as deadpan and as such, he is one of few Muppets who is rarely flustered by the show's prevalent mayhem. He is claimed to be the Muppet most like Henson was in real life.