Dog breed
American Staffordshire Terrier
The Amstaff, or American Staffordshire Terrier, is a stocky, very strong bull-type terrier from the United States. At home it's usually affectionate and cheerful; outside it's confident and alert. Its reputation tends to arrive a step ahead of it, so it needs an owner with good judgment, thorough socialization and a firm hand on the leash.
- FCI Group III · Terriers · standard no. 286
- Weight
- 18–32 kg
- Height
- 43–48 cm
- Lifespan
- 12–16 years
- Origin
- United States
Temperament
A well-raised Amstaff is a dog that loves people: it greets guests with its whole body, climbs into laps and happily sleeps in the bed. The AKC gives it top marks for affection toward family and high marks for openness to strangers, along with maximum scores for alertness and protective instinct. With other dogs, things are more complicated. The breed descends from fighting dogs, and some individuals, especially adult males, won't tolerate provocation from other dogs. Once a scuffle starts it can end badly, because an Amstaff doesn't back down easily. It should get used to cats and small animals from puppyhood. It's stubborn but loves rewards and play, so positive training works better than force.
- Energy
- calmvery energetic
- Affection
- independentvelcro pet
- With children
- not idealgreat
- With other pets
- difficultgreat
- Trainability
- stubborneager to learn
- For first-time owners
- for experienced ownersyes
- With strangers
- waryoutgoing
- Playfulness
- dignifiedeternal puppy
- Shedding
- minimalheavy
- Grooming
- easydemanding
- Being left alone
- strugglescopes well
- Apartment living
- needs a house and yardgreat in a flat
- Barking
- quietvocal
- With other dogs
- difficultgreat
- Protectiveness
- lowhigh
- Drooling
- hardly anya lot
- Cold tolerance
- feels the coldexcellent
- Heat tolerance
- strugglescopes well
Scores of 1–5 compare the breed with other breeds of the same species, based on the sources at the bottom of the page. Every animal is different. How we score traits
Who is the American Staffordshire Terrier for?
The Amstaff suits an experienced owner who enjoys being active, trains consistently and understands that a dog this strong has to be fully under control. In a family with children it can be a wonderful companion, but it needs supervision around guests and other dogs. Don't choose one if you want a dog to run free at dog parks, can't physically hold a 30-kilogram dog on a leash, or have cats at home with no chance of a gradual introduction.
Pros
- very affectionate with its family
- short, easy-care coat
- adapts well to apartment life
- long-lived for its size
Challenges
- may not tolerate other dogs
- its strength calls for a firm hand
- public prejudice against the breed
- prone to skin allergies
Size and looks
| Height at the withers | males 46–48 cm, females 43–46 cm |
|---|---|
| Weight | males 25–32 kg, females 18–25 kg |
| Lifespan | 12–16 years |
| Coat | short |
| Colors | brindle, fawn, black, blue, red, pied with white |
| Country of origin | United States |
| Classification | Group III: Terriers |
| Also known as | Amstaff, AmStaff, AST |
Care and exercise
An Amstaff needs about an hour to an hour and a half of exercise a day, ideally with strength-based activities: tug of war, retrieving uphill, running beside a bike for adult dogs. Because of how it may react to other dogs, keep it leashed in public places and allow off-leash running only in fenced areas or with dogs it knows well. The short coat needs brushing once a week. Check the skin, as the breed is prone to allergies. Start training early: recall, calmly passing other dogs, and letting go of a toy on cue. Amstaffs gain weight easily, so watch portions and treats. The short coat without a dense undercoat doesn't keep the dog warm, so a dog coat helps in freezing weather, and at night the dog belongs in a warm bed indoors, not in an outdoor kennel.
How much should the American Staffordshire Terrier eat?The calculator starts from this breed’s typical weight: calories and grams a day.Health and breed-related conditions
The AKC describes the Amstaff as a sturdy, healthy breed but recommends that breeders screen for hip dysplasia, heart disease and hypothyroidism. The breed is also affected by cerebellar ataxia linked to the NCL4A mutation, a neurological disease in which coordination usually deteriorates between ages 3 and 5. A DNA test lets breeders avoid mating carriers, so ask for both parents' results. Skin allergies are a common problem and often take a long time to diagnose. The AKC gives a life expectancy of 12–16 years.
- hip dysplasiaBreeders should X-ray their dogs' hips before breeding.
- cerebellar ataxia (NCL4A)A progressive loss of coordination, usually between ages 3 and 5; a DNA test is available.
- heart diseaseThe AKC recommends a cardiac exam for breeding dogs.
- skin allergiesItching, redness and recurring skin inflammation are fairly common in the breed.
- hypothyroidismOn the AKC's list of recommended tests for breeding dogs.
Health tests to ask the breeder about
- hip X-rays (HD)
- cardiac exam
- thyroid testing
- NCL4A DNA test (cerebellar ataxia)
This is general breed information, not a diagnosis. If something worries you, talk to your veterinarian.
Breed history
The Amstaff's ancestors were developed in 19th-century England by crossing bulldogs and terriers bred for bloody animal-baiting entertainment that was eventually outlawed. In the mid-1800s these dogs reached America, where breeders created a larger, heavier type than the English Staffordshire Bull Terrier. Over time the AKC split the two types into separate breeds. The breed often appeared in American popular culture: Petey, the dog from the 1930s "Our Gang" comedies, was an Amstaff. The FCI recognizes the breed in the terrier group, in the bull-type terrier section, without a working trial.
Fun facts
- Unlike the American Pit Bull Terrier, the Amstaff is not on Poland's list of breeds considered aggressive.
- Petey, the dog in the 1930s American "Our Gang" comedies, was an Amstaff.
- The FCI standard allows any color, though it discourages dogs that are more than 80% white, black and tan, or liver.
- According to the AKC, an Amstaff was a passenger on the first car trip across the United States in 1903.
Frequently asked questions
Do you need a permit to own an Amstaff in Poland?
No. A 2003 regulation from Poland's Ministry of the Interior lists 11 breeds considered aggressive, and the American Staffordshire Terrier is not one of them. A municipal permit is required for breeds such as the American Pit Bull Terrier, which the Amstaff is often confused with.
How long do Amstaffs live?
The AKC gives 12–16 years. Lifespan depends largely on keeping the dog lean with healthy joints, and on whether the parents were tested for cerebellar ataxia.
Do Amstaffs get along with other dogs?
It varies. Many Amstaffs live peacefully with a second dog, especially one of the opposite sex, but some adults won't tolerate unfamiliar dogs. Socialization from puppyhood helps, though it doesn't completely change the breed's predispositions.
Are Amstaffs good with kids?
They are often very patient and love playing with children, but they are strong and can knock a toddler over. The AKC rates the breed as average with young children, so play should always be supervised by an adult.
How much does a American Staffordshire Terrier weigh?
Adult dogs of this breed usually weigh: males 25–32 kg, females 18–25 kg. Height at the withers: 43–48 cm. That range is for healthy adults in good condition.
This breed also appears in
Sources
- 1FCI standard nr 286 – American Staffordshire Terrierfci.be
- 2AKC – American Staffordshire Terrierakc.org
- 3Rozporządzenie MSWiA z 28 kwietnia 2003 r. w sprawie wykazu ras psów uznawanych za agresywneisap.sejm.gov.pl
Last reviewed: November 12, 2026. Spotted a mistake? Tell us.
