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Which dog breeds are the most intelligent? And just what makes them so smart? We took the list of the top ten brainiest breeds and asked dog guru Billy Rafferty, author of "Happy Dog: Caring for Your Dog's Body, Mind and Spirit" to give his perspective. "While most smart dogs have certain traits in common -- loyalty, vigilance, perceptiveness, a caring nature -- "there are many different kinds of intelligence," says Rafferty. "Canine intelligence is more nuanced than people think." In the photo gallery below, Rafferty explains the pros and cons of owning these clever (but sometimes high maintenance) canines. And to learn more about how the original list was created, check out "The ...

Getty Images Dog Breed: Miniature Schnauzer Personality: According to the American Kennel Club breed standard, a miniature schnauzer is "alert and spirited, yet obedient to command. He is friendly, intelligent and willing to please." The American Miniature Schnauzer Club describes the breed as "Sweet, loving and loyal. They often have a favorite person, even though they will love the whole family." However, the breed does tend to be a bit vocal. "They will bark when someone comes to the door," says the AMSC. Grooming: "Miniature schnauzers should be groomed every five to eight weeks to look their best," according to the AMSC's website. "The breed has a double-coat; wiry topcoat and soft ...