The Biggest Mistake People Make with Their Dogs

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There aren't too many people who understand and connect with dogs that way Cesar Millan does—which is why he came to be known as the Dog Whisperer. In 2005, Oprah brought Cesar on the show to talk about his uncanny ability to communicate with man's best friend. He proved his skills by helping Stedman Graham's pup work through issues of low self-esteem.

After the show, Cesar stuck around to delve into pooch psychology. Watch the video above as he tells Oprah about the biggest mistake people make as dog owners, explaining how, with a little more understanding of the canine mind-set, you can teach an old dog new tricks after all.