In 2002, after a profile in the Los Angeles Times, Millan worked with MPH Entertainment, Inc. developing a television pilot for Dog Whisperer, a reality television series that follows Millan as he works in the field of dog rehabilitation. The series premiered on September 13, 2004, on the National Geographic Channel, subsequently moving to the Nat Geo WILD channel. The show would become National Geographic's No. 1 show during its first season[24] and was broadcast in more than eighty countries worldwide during its run.[6] The final episode of the show was broadcast in the U.S. on September 15, 2012.[25]

Dogs don’t speak English, and just because we might yell at our dog as we catch him in the middle of peeing on the floor and then rush him outside where he finishes it off… doesn’t mean we did an effective job at telling him that outside was where he was supposed to go. We are usually too focused on getting him NOT to go inside, instead of going outside.
The concepts of "pack" and "dominance" in relation to dog training originated in the 1940s and were popularized by the Monks of New Skete in the 1970s. The model is based on a theory that "dogs are wolves" and since wolves live in hierarchical packs where an alpha male rules over everyone else, then humans must dominate dogs in order to modify their behavior.[72] However, recent studies have shown that wolves in the wild actually live in nuclear families where the father and mother are considered the pack leaders, and their offspring's status depends on their birth order which does not involve fighting to attain a higher rank, because the young wolves naturally follow their parents' lead.[73]
Pups between the ages of 9–12 weeks who were permitted to observe their narcotics-detecting mothers at work generally proved more capable at learning the same skills at six months of age than control puppies the same age who were not previously allowed to watch their mothers working.[56] A 2001 study recorded the behaviour of dogs in detour tests, in which a favorite toy or food was placed behind a V-shaped fence. The demonstration of the detour by humans significantly improved the dogs' performance in the trials. The experiments showed that dogs are able to rely on information provided by human action when confronted with a new task. Significantly, they did not copy the exact path of the human demonstrator, but adopted the detour behavior shown by humans to reach their goal.[57] A 1977 experiment by Adler and Adler found that puppies who watched other puppies learn to pull a food cart into their cages by an attached ribbon proved considerably faster at the task when later given the opportunity themselves. At 38 days of age, the demonstrator puppies took an average of 697 seconds to succeed, while the observers succeeded in an average of 9 seconds.[58]

A satirized version of Millan was portrayed in "Tsst", the May 3, 2006, episode of the Comedy Central animated series South Park. In the episode, Liane Cartman enlists Millan's help in applying his principles to her misbehaving son, Eric Cartman. The principles work and Eric temporarily becomes completely reformed. However, in the end when he refuses to go on an outing with his mother, she caves in to his demands in order to persuade him to go along with her, thus reverting his behavior to its original state. In 2010, when Millan was asked if he was offended at all by the episode, he stated that the creators of the show (Trey Parker and Matt Stone) contacted him to inform him of their intentions beforehand and that he found the episode fantastic.[52] Millan reacted to the episode in a video posted on November 13, 2019 to his YouTube channel.[53]
Clicker training, a common form of positive reinforcement, is a simple and effective dog training method. Although it is still fine to train your dog without clicker training, many people find it helpful. With clicker training, you can easily and effectively teach your dog all kinds of basic and advanced commands and tricks. It's fast and easy to learn how to clicker train your dog