The GCR breed standard of a/an American Bully are as follows.
The American Bully is recognizable by its compact, strong, thick-set structure and build. The appearance reflects a strong American Pit Bull Terrier foundation, blended with stock from other bull breeds.
Well balanced athletic build is essential along with proper muscle tone. A smooth coated dog that possesses great strength for its size. Although quite muscular, it is active and agile. The overall appearance should reflect confidence and strength without giving an intimidating demeanor.
The American Bully breed is, first and foremost, a companion, exhibiting confidence with a zest and exuberance for life. Despite its powerful appearance, their demeanor is gentle and friendly. This breed makes an excellent family dog. The ideal American Bully possesses the athleticism to do well in performance events.
Aggressive behavior towards humans is uncharacteristic of the breed, and highly undesirable.
The American Bully breed head is unique and a key characteristic. It is large and broad, but never disproportionate to the overall dog. There is a well-defined, moderately deep stop. The flews are deep, but always clean. Cheek muscles are prominent and free of wrinkles. The muzzle is broad and blocky, or slightly square. The length of the muzzle is shorter than the length of the skull, being from 25 to 35 percent of the overall length of the head. The top of the muzzle is straight. The lower jaw is well-developed, wide and deep. The overall structure of the lower jaw, muzzle, stop and skull planes should bear little to no characteristics of the English Bulldog. The nose is large, with well-opened nostrils. All colors of nose pigment are acceptable. Nose color is usually in harmony with coat color. The American Bully has a complete set of evenly spaced, white teeth meeting in a scissors or even bite. Eyes are medium size, oval to slightly round, and set well apart and low on the skull. All colors are equally acceptable except blue. The haw should not be visible. Ears are set high, and may be natural or cropped, without preference. Prick, or flat, wide ears are not preferred. The neck is of moderate length and muscular. There is a slight arch at the crest. The neck widens gradually from where it joins the skull to where it blends in to well laid-back shoulders. The skin on the neck is without excessive dewlap.
The body is close-coupled, with a broad, deep chest, and well-sprung ribs. The chest may be wider than it is deep, but free from exaggeration. The forechest does not extend forward much beyond the point of the shoulder. The back is wide, strong and firm. The topline is level and straight. The croup slopes slightly downward to the base of the tail. The loin is wide and short. The distance from the withers to the elbow is equal to the distance from the elbows to the bottom of the feet. Dogs that are slightly shorter in distance from the elbows to the bottom of the feet are acceptable but not desirable.
The shoulder blades are long, wide, muscular and well laid back. The upper arm is roughly equal in length to the shoulder blade, and joins at an apparent right angle. The forelegs are strong and muscular with a slight turn to the forearm. The elbows are set close or just slightly away from the body. Viewed from the front, the forelegs are set moderately wide apart, and are perpendicular to the ground. The pasterns are short, powerful, flexible, and set at a slight angle. The hindquarters are strong, muscular and broad. The rump is well-filled-in, and deep. The thighs are well developed, with thick muscles. Viewed from the side, the hock joint is well bent, and rear pasterns are well let down and perpendicular to the ground. Viewed from the rear, the rear pasterns are straight and parallel to one another.The feet are tight, round, proportionate to the size of the dog and well-arched.
The tail is set on as a natural extension of the topline, and tapers to a point. When the dog is moving, the tail is carried level with the topline. When the dog is excited, the tail may be carried slightly higher, but never carried over the back. When the dog is standing and relaxed, the tail is carried low and extends approximately to the hock.
The coat is glossy and smooth, close, and moderately stiff to the touch.
The American Bully breed moves with a jaunty, confident attitude, conveying the impression that he expects any minute to see something new and exciting. When trotting, the gait is effortless, powerful, and well-coordinated, showing good reach in front and drive behind. When moving, the backline remains level with only a slight flexing to indicate suppleness. Viewed from any position, legs turn neither in nor out, nor do feet cross or interfere with each other. As speed increases, feet tend to converge toward center line of balance.
The ideal height range for an adult is from 16 to 19 inches at the withers.
It is important to note that dogs slightly over or under these height ranges are not to be penalized unless they are disproportionately massive or rangy. Overall balance and the correct proportion of weight to height is far more important than the dog's actual weight and/or height.