Doberman
A large sized, short-haired, A.K.C-registered breed.  First developed in Germany by the tax collecter Louis Dobermann. Dobermans are very clingy to their owners and make a loyal, well tempered dog if raised correctly. Could become aggressive if not given proper care and training. The tail is traditionally docked from puppyhood and ears may be cropped or left natural.  Comes in red, fawn, black, or blue with either rust or tan markings. Some are also born pure white which is a fault in the show ring.  Dobermans are prone to heart conditions as well as color deformity. Also a very intelligent breed that needs mental excercise as well as physical.
The Doberman makes a loyal dog, but if raised incorrectly, it may become aggressive.