Perhaps best known as Toto in the Wizard of Oz, the Cairn Terrier is more than just a cute face. These dogs were bred in Scotland to hunt, chase down and rid farms of vermin. They're tough and smart, with a fearless never-say-die attitude. Your Cairn terrier puppy will love being with his family and will thrive on lots of affection, exercise and chances to explore. The same traits that make the Cairn Terrier such a good working dog can make him independent-minded, too, so obedience training and positive reinforcement will help him be an ideal family companion.