Happy National Dog Day! Depicted are: A - Astro (The Jetsons) B - Blue (Blue's Clues) C - Clifford the Big Red Dog D - Scooby-Doo E - Everest (Paw Patrol) F - Frankenweenie / Sparky G - Gromit (Wallace & Gromit) H - Huckleberry Hound I - Isabelle (Animal Crossing) J - Jake the Dog (Adventure Time) K - Krypto (DC) L - Lassie M - Muttley (Wacky Races) N - Nana (Peter Pan) O - Odie (Garfield) P - Pluto Q - Quark (Honey I Shrunk the Kids) R - Rowlf (The Muppets) S - Snoopy (Peanuts) T - Tramp (Lady & the Tramp) U - Underdog V - Vinny Griffin (Family Guy) W - Wonder Dog (Super Friends) X - Exile (Road Rovers) Y - Old Yeller Z - Zero (The Nightmare Before Christmas)