Training a dog involves 25 % for the dog and 75% for the owner. If the owner does not learn how to lead (or follow through with the training) a dog, then it was a waste of $$. Dogs are very smart and know if they are in control or the owner is in control. Training is not a few minutes a week but hours each day. big dogs should not be owned by people who do not have the time or energy to keep up with the daily training.