Here are 20 of the cutest dog costumes, which just so happen to be on 20 of the cutest dogs. There’s nothing cuter than a puppy—except, of course, a puppy in a costume.

There are annual parades that award "best dog" costumes or "cutest puppy." Or, it’s their birthday! Maybe a formal bow tie and “vest-lette” or a little party hat. And I’ve often seen dogs ...