The term 'cartoon dog' refers to a variety of animated canine characters from television and film. The crossword solutions for this term include Astro (5 letters), ARF (3 letters), GOOFY (5 letters), Odie (4 letters), Doo (3 letters), OTTO (4 letters), Snert (5 letters), Ren (3 letters), and ScoobyDoo (9 letters). Astro is a space-faring dog from the Hanna-Barbera cartoon 'The Jetsons'. ARF is the loyal pet of the title character in the comic strip 'Dennis the Menace'. GOOFY is a clumsy but lovable anthropomorphic dog from Disney's 'Mickey Mouse' franchise. Odie is the dimwitted but lovable companion of Garfield the cat. Doo is the name of ScoobyDoo's nephew, who appears in the animated series 'Scooby-Doo and Scrappy-Doo'. OTTO is the title character of the Nickelodeon cartoon 'OTTO's World'. Snert is a bulldog from the comic strip 'Hi and Lois'. Ren is the title character of the cult classic cartoon 'Ren and Stimpy'. Finally, ScoobyDoo is the titular Great Dane from the long-running Hanna-Barbera cartoon series of the same name.