In 1944, Blake began playing a Native American boy, "Little Beaver," in the Red Ryder western series at the studios of Republic Pictures (now CBS Radford Studios), appearing in twenty-three of the movies until 1947. He also had roles in one of Laurel and Hardy's later films The Big Noise (1944), and the Warner Bros. movies Humoresque (1946), playing John Garfield's character as a child, and The Treasure of the Sierra Madre (1948), playing the Mexican boy who sells Humphrey Bogart a winning lottery ticket and gets a glass of water thrown in his face by Bogart in the process. In 1950, at age 17, Blake appeared as Mahmoud in The Black Rose and as Enrico, Naples Bus Boy (uncredited) in Black Hand.
