"Some old school, force-based trainers insist that you have to overpower the dog with force, using things like scruff shakes (where the handler grabs the sides of the dog's neck and shakes him), and alpha rolls (where the handler flips the dog onto his back and holds him there until he stops resisting) or, if necessary, by hanging the dog with a choke collar until he submits or collapses in unconsciousness. Most owners, thankfully, are unwilling or unable to inflict this kind of abuse on their dogs. These abused dogs frequently end up biting or becoming enough of a threat that they are surrendered to animal shelters, where they are usually euthanised as dangerous and incorrigible. Sadly, if these dogs had been trained with non-confrontational methods, they might have been fine."
Pat Miller - The Power of Positive Dog Training
