Dogs were asked to execute increasingly more tasks and also they adjusted brilliantly to our needs by altering in shape, colour, character and also dimension. But today's approach, claims Wiley author Cindy Kitchel, "is becoming extra pleasant, and also positive methods are proven successes." Dog Whisperer Cesar Millan made pet dog training fashionable with his 2006 bestseller, Cesar's Way (see sidebar at left), as did Tamar Geller's The Loved Dog: The Playful, Nonaggressive Way to Teach Your Dog Etiquette, which spent three weeks on PW's list this spring.