Aloofness with strangers

Dobermans were not bred to be social butterflies, they were bred to look intimidating and guard their owner from other people and other animals. As selective breeding continues, Dobermans are slowly being bred to be more human and dog social, but there is nothing wrong with your Doberman not wanting to interact with strangers or not being friendly with other dogs, in fact, that is the norm. Never force your Doberman to interact with someone if they are not comfortable with it, this could lead to fearfulness and fearfulness can lead to a bite. Again, this was a breed designed to protect their inner circle.