With more than 25 years of experience, renowned dog behavior expert and New York Times best-selling author Cesar Millan is one of the most sought-after authorities in the field of dog behavior and rehabilitation. In March 2014, Millan brings his unmatched canine abilities to communities terrorized by unruly hounds in Nat Geo WILD's new series "... See full bio »
Millan's work focuses on handling a dog with what he calls "calm-assertive energy". He believes that dog owners should establish their role as calm-assertive pack leaders. According to Millan, dogs have three primary needs: exercise, discipline and affection, in that order. In other words, it is the owner's responsibility to fulfill the dog's energy level needs through challenging exercise; then to provide clearly communicated rules, boundaries and limitations; and finally, to provide affection. According to Millan, a common pitfall for American dog owners is to give a great deal of affection with very little exercise and even less discipline. He encourages owners to understand the effect their own attitudes, internal emotions and physical postures have on a dog's behavior, counseling owners to hold strong posture (i.e., shoulders high and chest forward) and to project energy that is calm-assertive.
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." 
Before enrolling with a particular club contact them and ask if you can go to watch a class without your dog. This will help you decide if this is the right environment for you and your dog. Some clubs have waiting lists and you will need to book ahead, some accept people on a roll on roll off basis. Prices will vary from a joining fee and then weekly payments to a one off fee for a certain length of training.