If you want to prevent accidents before they happen you’re going to need to watch your pup at all times, including every time they wander off. It only takes one accident to set your training back. Now I know that watching your puppy non-stop isn’t exactly fun & exciting, but being able to catch them before they have an accident is why this method works so well.
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 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. "