Some cartoon dogs chase mailmen. Others solve mysteries, fly imaginary fighter planes, hunt for clues, or somehow become the smartest person in the room. From Snoopy and Scooby-Doo to Pluto, Brian Griffin, Blue, and Courage, these dogs come from completely different corners of animation—and that’s what makes the argument so good. Are you taking the dog who made you laugh hardest, the one you grew up with, or the sidekick you’d actually want by your side? Vote through the head-to-head matchups and help decide the greatest cartoon dog of all time.