Millan was born on August 27, 1969, to Felipe Millán Guillen and María Teresa Favela in rural Culiacán, Sinaloa, Mexico. Millan grew up working with animals on the farm in Sinaloa where his grandfather was a tenant farmer. Because of his natural way with dogs, he was called el Perrero, "the dog herder". The family later moved to Mazatlán. Millan illegally crossed the border into the United States when he was 21 years old, speaking no English and with only $100. In an interview with long-time friend Jada Pinkett Smith in July 2018, Millan described his harrowing journey. On crime along the Mexican border: "Once you get to the border, what you see is people wanted to take advantage of you. So that's when you learn about the streets. But that's another level of streets. They can sell you. They can kill you for organs. That is more likely than jumping it." On United States Border Patrol: "There were many times I let the border patrol catch me because Americans feed you. So when they catch you, they feed you. Mexican police don't feed you." On his friendship with Jada Pinkett Smith: Millan met Pinkett Smith shortly after arriving in Los Angeles and confided in her his dreams of working with pets on television; she told him that he needed to learn English and set up one of her friends to teach him. "Because of Jada, I speak English. "
Researchers have described several reasons why the dominance model is a poor choice for dog training. First, a relationship based on dominance is established to gain priority access to scarce resources, not to impose particular behaviors on the less dominant animal, so the dominance model is irrelevant for most of the behaviors that people want from their dogs, such as coming when called or walking calmly on a leash. Second dominance-submission relationships, once established, are constantly tested and must be regularly reinforced. Thus people, particularly children and the elderly, may not be able to retain their rank and are at risk of being injured if they attempt to do so. Third, dominant individuals gain priority access to resources, but only while they are present, establishing dominance over a dog does not guarantee its behavior when the dominant individual is distant or absent.
The Monks of New Skete, who were breeders and trainers of German Shepherds in Cambridge, New York, published How to Be Your Dog's Best Friend: A Training Manual for Dog Owners in 1978 and it became an immediate best seller. Despite advocating a philosophy that "understanding is the key to communication and compassion with your dog," they endorsed confrontational punishments which were later shown to elicit dangerously aggressive responses in many dogs.
Both dogs and humans benefit from a predictable, consistent house training routine. This routine should account for confinement time, potty breaks, meal times, play time, training time, walks, and all the other enriching activities that are part of your dog’s daily life. Routines make your job easier and help your new puppy get use to your lifestyle.
Even if you try to transition to the outdoors, your puppy will be confused because you will likely have items resembling potty pads lying around the house. Do you have pillows? Blankets? Sheets? Rugs? It’s not a stretch to think that your puppy, or an older dog, even, may confuse one or more of these items with plushy, soft potty pads and decide it would rather go there than outdoors. Just save yourself the headache and don’t use puppy pads.
According to a January 2007 article in the Indian scientific journal Current Science, some professional dog trainers find Millan's methods outdated, flawed and "unscientific and inhumane." Millan's detractors say that what Millan calls "calm submission" is actually a state of helplessness that is the result of averse dog-training techniques. A study in Applied Animal Behaviour Science said Millan has been influential in popularizing punitive techniques, but that bad behavior from dogs was caused by fear and anxiety, not a lack of the owner's alpha status. Malcolm Gladwell, writing for The New Yorker, said that critics were responding to a "highly edited" version of his approach on television, which exaggerates the frequency and intensity that he uses when he disciplines the dogs.
One of the biggest predictors of a speedy potty training process is owner diligence. If you’re on top of your puppy’s schedule and you stick to a strict prevention and supervision regiment, you should be well on your way to potty training success within a few months. You can consider your puppy almost fully housetrained when you’ve gone an entire month without a single accident, but keep in mind that potty training is an inexact science. It’s best to have several dry months before you can really trust that your puppy understands the rules.
One of the biggest mistakes new puppy owners make is expecting their puppy to hold it for longer than he is physically capable. The general guideline for puppy “hold times” is that each month of age equates to an hour of “hold time,” so a two-month-old puppy can hold it for roughly two hours. There are exceptions to the rule; your puppy should be able to hold it for slightly longer period of time at night as he gets older and you pup will need potty breaks more frequently when he’s playing.
Lindsay says of this study, "Schilder and Van der Borg (2004) have published a report of disturbing findings regarding the short-term and long- term effects of shock used in the context of working dogs that is destined to become a source of significant controversy ... The absence of reduced drive or behavioral suppression with respect to critical activities associated with shock (e.g., bite work) makes one skeptical about the lasting adverse effects the authors claim to document. Although they offer no substantive evidence of trauma or harm to dogs, they provide loads of speculation, anecdotes, insinuations of gender and educational inadequacies, and derogatory comments regarding the motivation and competence of IPO trainers in its place." 
Millan's TV programs are centered on the rehabilitation of dogs while Millan concurrently educates the dog owners in his dog-handling philosophy. Conversations with owners typically revolve around his philosophy: that healthy, balanced dogs require strong "pack leadership" from their owners, while Millan demonstrates how owners can achieve and maintain a leadership role with their dogs. In some cases, Millan takes dogs with severe behavioral problems to his Dog Psychology Center for an extended period of more intensive rehabilitation. The programs are not intended as a dog training guide, and each episode contains repeated warnings that viewers should not try the behavior modification techniques at home without the guidance of a professional.
Every dog needs to learn to walk on a leash. Besides the fact that most areas have leash laws, there will be times when keeping your dog on a leash is for his own safety. Learn how to introduce your dog or puppy to the leash, then teach him how to walk properly on the leash, even beside you on a bike. A loose leash walk teaches your dog not to pull or lunge when on the leash, making the experience more enjoyable for both you and your dog.