This Lab Pit Bull mix was very aggressive when a stranger would approach his owners.
Testing a similar situation here that would cause a reaction, from aggression to jumping.

Premier Pack Dog Training and Behavior Solutions is located in Canton, Michigan, between Detroit and Ann Arbor. We specialize in board and train programs to help create significant improvements in your dog's behavior. Eric Devine has been working with dogs for over 25 years and uses his immense knowledge and expertise to deliver results that can benefit you and your dog for a lifetime.