according to John D. Johnson
Being that of a great powerful dog showing strength, endurance and alertness. Powerfully built, but active.
SIZE & WEIGHT:
Males to be 23 - 28" at withers. Weight. 90 - 150 lbs. (Slightly larger or smaller is not a fault). Females to be 20 - 26" at withers. Weight. 70 - 130 lbs. (Slightly larger or smaller is not a fault).
Expression: intelligent with keen alertness. The head should be square or have a round basketball look, and well muscled. The "STOP" should be deep and abrupt.
Should be broad, not long and narrow. Length of "MUZZLE": Not less than 1 inch to not
more than 3 inches. (Preferred length: 2 to 2 1/2 inches).
At least 1/4 to 1 inch (Undershot) depending on size of dog and shape of head.
Almond-shaped to round, medium-sized: Normal Color. brown. Acceptable Colors: gray, green or light blue eye(s).
Small to medium, carried close to the head, or rose ears.
Slightly arched of moderate length. Very muscular - almost equal to the head in size.
Fairly compact with wide deep chest. The loin is wide, muscular and slightly arched.
Strong at the root and tapering to the hocks (normal relaxed position; however, many will carry their tails over their backs, especially when excited or walking).
Short and soft.
Solid white only.- all shades of brindle (white, red, yellow, blue, brown, black or gray); red and white; fawn and white; beige and white; buckskin and white; black and white; brown and white; mahogany and white; cream and white.
The combined front assembly from its uppermost components, the shoulder blades, down to the feet should be muscular and slightly sloping. The "Forelegs" are to be straight. Bone structure: medium to heavy - to be able to carry a large dog.
Broad with muscies tapering well down the leg to show speed and strength, but not quite as large as shoulders.
Full black mask; cow-hocked; splayfooted; even and scissor bite; glass eye(s); docked tail (can be registered, but will be prohibited from the "Show Ring").