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.

From tiny Chihuahuas to energetic beagles, some dogs are simply built to go the distance, a veterinarian told Newsweek.

Meera Pal is a Northern California-based writer with a background in journalism and books. She covers pets, real estate, tech, and everything in between. You can follow her on Twitter @Meerakat Kelly ...

Happy National Dog Day! The numbers don’t lie: Americans love their dogs. According to Forbes, more than 65 million U.S. households have a dog, making pooches the most popular pet in the country. But ...