Wow! I see Sheldon Mayer started working for DC in 1935! He did Scribbly, Popsicle Pete, Littul Snoony, Dizzy Dog, Doodles Duck, Bo Bunny, Li'l Chic-a-Dee and Three Mouseketeers stories among others in All-American Comics, Comic Cavalcade, Funny Stuff, Scribbly, Leave It to Binky, Leading Screen Comics, Hollywood Funny Folks, Movietown's Animal Antics, Peter Porkchops, Dodo and the Frog, Raccoon Kids, Nutsy Squirrel and Three Mouseketeers before Sugar and Spike 1 in early 1956. And he continued to do Dizzy Dog, Doodles Duck, Bo Bunny and Three Mouseketeers stories well into 1957!