American Bully Stud Dog: Health Testing, Pocket to XL, and Color Genetics

One of the fastest-growing breeds in America — and one where stud selection has never mattered more

The American Bully has exploded in popularity over the last decade. Bred from American Pit Bull Terriers and American Staffordshire Terriers with other bully-type influences, the American Bully is a confident, loyal, and surprisingly gentle companion that has found devoted owners worldwide. The breed comes in four official ABKC-recognized size classes, a stunning range of colors, and has one of the most active stud dog communities of any breed.

But the same popularity that has driven demand has also driven careless breeding. Hip dysplasia, heart conditions, and skin issues are common in poorly bred lines. Health testing is not optional — it is what separates serious breeders from those chasing quick profits.

American Bully Size Classes

The American Bully Kennel Club (ABKC) recognizes four size classes:

Pocket — Males under 17 inches at the withers, females under 16 inches. The most popular size class in most markets. Compact, heavily muscled, and in extremely high demand.

Standard — Males 17-20 inches, females 16-19 inches. The foundation size of the breed.

Classic — Same height as Standard but with less body mass and a lighter frame. A more traditional bully type.

XL — Males over 20 inches, females over 19 inches. Increasingly popular for buyers who want maximum size and presence.

When choosing a stud, confirm he is within the correct size class for your breeding goals and verify his height — height-frauding (claiming a dog is smaller or larger than he is) does occur in this breed.

Health Testing for American Bully Studs

The ABKC and responsible American Bully breeders recommend:

OFA Hip Evaluation — Good or Excellent

Hip dysplasia is one of the most common orthopedic issues in American Bullies, particularly in heavily muscled, low-to-the-ground Pocket and XL dogs. OFA evaluation at 24 months or older is the standard. Good or Excellent ratings are required for a responsibly health-tested stud.

OFA Cardiac Evaluation

Congenital heart conditions occur in American Bullies. An OFA cardiac evaluation by a veterinarian (ideally a board-certified cardiologist) is recommended.

CAER Eye Examination

Several hereditary eye conditions including cataracts occur in bully-type breeds. Annual CAER exam is recommended.

Cerebellar Ataxia (CA) — DNA Test

Cerebellar Ataxia is a progressive neurological condition causing loss of coordination. A DNA test is available. Clear studs are strongly preferred; Carrier studs should only be bred to Clear dams.

Hyperuricosuria (HUU) — DNA Test

HUU causes the formation of urate bladder and kidney stones. DNA testing identifies Clear, Carrier, and Affected dogs. Breeding two HUU-Affected dogs produces a litter where all puppies will be Affected. A Clear or Carrier stud bred to a Clear dam is safe.

American Bully Color Genetics

American Bullies come in virtually every dog color and pattern. Some of the most sought-after:

Merle

Merle produces a mottled, patchwork pattern of diluted color. It is produced by the M locus gene. Never breed merle to merle — double merle (MM) American Bullies are at extremely high risk for blindness and deafness. A merle stud should only be bred to a confirmed non-merle female. DNA testing to confirm merle status (including cryptic merle) is essential before any merle breeding.

Tri-Color

Tri-color American Bullies carry tan points (at the A locus) underneath their base color, creating a three-color dog. Ghost tri (carrying tan points that are barely visible) studs can produce visibly tri offspring when bred to a tri carrier or tri female.

Champagne, Lilac, and Isabella

These rare dilute colors command the highest prices in the American Bully market. Lilac is produced by bb (recessive brown) and dd (dilution) — a double recessive requiring careful carrier testing. Isabella or champagne involves additional dilution genes. These colors require DNA testing to produce reliably.

Blue, Chocolate, and Exotic Colors

Blue (dd dilution), chocolate (bb), and their combinations are in high demand. DNA testing both parents for their color genotype is the most reliable way to predict litter outcomes.

What Does an American Bully Stud Fee Cost?

American Bully stud fees have some of the widest ranges of any breed — from $500 for a pocket pet-quality dog to $50,000+ for top-titled, rare-color champions in the XL category.

Factors driving price:

• Color — Lilac, merle, and exotic colors command massive premiums
• Size class — Pocket studs in high demand often exceed XL studs in price
• ABKC Championship and show record
• Proven litter history — Photos and testimonials from previous breedings
• Bloodlines — Certain bloodlines (Mikeland, Gottiline, Razors Edge) carry premium status

Questions to Ask Before Booking

• Can I see OFA hip and cardiac certificates?
• Has the stud been DNA tested for CA, HUU, and color genetics?
• Is the stud ABKC registered, and can I verify his size class measurement?
• If he is merle, has he been DNA tested to confirm single merle status?
• What colors has he produced, and can I see photos of previous litters?
• Has he produced litters before, and can I speak with previous dam owners?
• Will you provide a written stud contract?

Summary

A quality American Bully stud has OFA hip and cardiac clearances, DNA testing for CA and HUU, documented color genetics (especially critical for merle and exotic color pairings), and an owner who is transparent about his size class measurement and previous litter outcomes. The American Bully market rewards exceptional dogs — but only breeders who combine health testing with honest representation build the lasting reputation the breed deserves.