National Kennel Club
Tall, Stands erect with head held high, with back straight neither swayed nor ridged. The tail should be down approximately to teh hocks, chest wide and moderately deep.
Broad, flat on top squared appearance with muzzle short to medium in length, with a prominate dish between eyes. Lower jaw should protrude slighyly more than the upper jaw, with wide apart eyes. Ears medium in size with a roll backwards or a flop.
Very friendly in daytiem, but very aggressive at night especially with the persons not known. This dog should be eager, bold, and trusting with no signs of fear or timidity. Agressive enough to fight a mean bear or wild hog but gentle enough for a house pet.
White to all brindle colors mixed with white to solid brindle, solid black or black mixed with brindle or white.
Males from 22 - 32 inches and weighing from 70 to over 100 pounds. Females from 18 to 28 inches and weighting from 50 to over 80 pounds. Body structure should be big and rugged showing strength and endurance.
Follow the above standards: Dogs must be untrimmed and unaltered. Tails are held down at a normal stance. Exception--dogs may show if altered by a vet and handler has statement form the vet.