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American Bully: Complete Breed Guide

Last updated: August 15, 2026 · Written by PetsBeyondMiles Editorial Team
The American Bully is a companion breed built for a muscular look, not gameness. Here's size classes, temperament, health, and what to expect.

The American Bully is a relatively young breed, developed specifically to be a muscular-looking but even-tempered companion — not a working or fighting dog. Understanding that intent matters for judging what one is actually like to own.

What Is an American Bully?

The American Bully was developed in the United States starting in the 1990s, primarily by crossing the American Pit Bull Terrier with the American Staffordshire Terrier, with some lines incorporating Bulldog or Mastiff influence for added bulk. Breeders selected specifically for a stocky, heavily muscled build and a stable, people-focused temperament, moving deliberately away from the gameness and dog-aggression historically bred into some Pit Bull lines. The United Kennel Club recognized the American Bully as its own breed in 2013; the American Bully Kennel Club (ABKC) maintains the primary breed standard.

What Size Classes Does the American Bully Come In?

  • Pocket — the smallest class, generally under 17 inches at the shoulder
  • Standard — the most common class, roughly 17-20 inches, heavily muscled build
  • Classic — similar height to Standard but a leaner, less bulky frame
  • XL — the largest class, generally exceeding 20 inches for males, often 80-150 lbs

These are size classes within one breed, not separate breeds — an XL Bully and a Pocket Bully share the same standard and lineage, just bred toward different ends of the size range.

Close-up headshot portrait of an American Bully
The stocky, heavily muscled build is the American Bully's defining physical trait across every size class.

What Temperament Should You Expect?

Bred specifically as a companion, the American Bully is commonly described as affectionate, eager to please, and good with familiar children and adults when properly socialized. That said, its strength and size mean training and socialization aren’t optional extras — an American Bully that’s under-socialized or poorly managed is a much harder problem to handle than a smaller breed with the same gap in training.

What Health Issues Are Common in the Breed?

  • Hip and elbow dysplasia — a real concern in the heavier-boned XL and Standard classes especially
  • Brachycephalic-adjacent breathing issues — some lines with a more compressed face and thick neck can labor more in heat or during exertion
  • Skin fold and allergy issues — common in heavily wrinkled individuals, needing regular cleaning
  • Joint strain from rapid growth — XL Bullies especially can gain significant weight during puppyhood, and controlling growth rate matters for long-term joint health
An American Bully sitting with its owner in a backyard
Bred deliberately for a people-focused temperament, not the working drive of its ancestor breeds.

What Should You Know Before Getting One?

  1. Ask breeders for hip/elbow health testing on both parents, regardless of size class
  2. Plan for real daily structure — training and socialization, not just exercise
  3. Check your homeowner’s or renter’s insurance and local housing rules before committing, since bully-type breeds are sometimes affected by breed-specific policies even when the individual dog has no history of issues
  4. Budget for a large-breed dog’s lifetime food, vet, and grooming costs if you’re considering a Standard or XL Bully specifically

FAQ

Is the American Bully the same as a Pitbull?
No — the American Bully was developed from American Pit Bull Terrier and American Staffordshire Terrier bloodlines, but it's a distinct, purpose-bred companion breed with its own standard, recognized separately by the United Kennel Club since 2013.
How big does an American Bully get?
It depends heavily on the size class — Pocket Bullies stay under 17 inches at the shoulder, while Standard and Classic Bullies run roughly 17-20 inches, and XL Bullies exceed that, often reaching 80-150 lbs.
Are American Bullies good family dogs?
Generally yes when well socialized — the breed was deliberately bred for a calm, people-oriented temperament rather than the working drive of its ancestor breeds, though its strength and size still call for consistent training from an experienced or committed owner.

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