Dogs come in all shapes and sizes, but as any puppy aficionado knows, they are always cute—no matter how big or small—even when a dog tall enough to drink from the kitchen sink thinks he's a lapdog.

Did you know that the American Molossus Dog is the largest dog in the world? You're about to find out! In this video, we're ...

While these breeds are not new, they have just been recognized by the American Kennel Club as official breeds.