Before starting to teach any dog a teacher should be familiar with how a dog thinks. In its natural habitat in the wild, the dog belongs to a pack. If he is not the pack leader he fits somewhere within the hierarchy of the pack. If he does not obey the laws of the pack the leader will make certain that he complies. If a leader is not successful a new pack leader will be born. When we take a dog into our home, as far as he is concerned he belongs to a pack. No dog ever turns on his master, instead he challenges for leadership. Therefore if you are going to be the pack leader, you must have a way of maintaining control as far as the dog is concerned. You must establish definite rules and regulations which the dog as a member can never deviate from. If you are successful at enforcing the rules 99% of the time, then you are not the genuine pack leader. 99% will slip to 95% then to 90%. Eventually if the dog has a drive toward achieving pack leadership he might eventually challenge.