If you’ve ever noticed your friend’s tiny Chihuahua still bouncing around well into its teens while your neighbor’s Great Dane started slowing down after just a few years, you’re not imagining things.

Find your ideal companion with our complete guide to popular small dog breeds, including temperament, health, and care tips.

If you believe the statements from various websites on the Internet, there are huge differences in the behavior of dogs based upon their size. You will find statements like: "Big dogs are lovable ...