The grey Doberman does exist, although a grey-colored coat is not as common as other colors for this dog. Most often, a blue-grey color is found, according to Dog Breed Info.
Doberman Pinschers are intelligent and notoriously easy to train. They are best suited to owners who can give them a lot of attention and be consistent with rules and boundaries. Dobermans need a good deal of daily exercise and require socialization with other dogs and children at an early age if owners wish to prevent aggressive or skittish behavior.