The AKC has its own standards, as do some other countries, although most still adhere to FCI standards. The breed standard describes the Dobermann as a dog of medium size that is also strong and muscularly built. In order to be eligible to meet these standards, the body of the Dobermann should appear to be almost square. Although they are considered to be working dogs, Dobermanns are often stereotyped as being ferocious and aggressive. As a personal protection dog, the Dobermann was originally bred for these traits: it had to be large and intimidating, fearless, and willing to defend its owner from attackers (especially other guard dogs), but sufficiently obedient and restrained to do so only on command. Today's Dobermanns are known to have a much more even and good-natured temperament, as well as extreme loyalty, high intelligence, and great trainability. 