Since the dog's perception of a family member's rank may influence both the response to commands and his potential for aggression, a dog will only follow the command of a higher ranking member . It is important for a companion dog to understand that people always rank higher regardless of the rank with other dogs. If there is any question about the order of the ranking, the dog may test to see where you really stand or to try to move you into a subordinate position. If this miscommunication continues and the dog feels that you are a subordinate challenging his position, the conflict may escalate to the dog trying to bite. This same process occurs between dogs.
Dogs actually feel more secure when their position is clear even if it is as a subordinate.
A dog used to being dominant may not cooperate with being rolled onto its back since that would indicate submission. This dog may retaliate by struggling or showing signs of aggression to warn the caretaker to stop. Being able to restrain the dog may be important if the dog needs to be examined. Also, a dog that does not recognize you as a dominant leader may choose not to obey a command. Your leadership role should be reinforced regularly by you setting the schedule for food and attention rather than just giving these when the dog asks for them.