What is the difference between a American Staffordshire Terrier and a Newfoundland?

The American Staffordshire Terrier is 40–70 lbs, 17–19 in sized while the Newfoundland is 100–150 lbs, 26–28 in sized. They differ in size (40–70 lbs, 17–19 in vs 100–150 lbs, 26–28 in), lifespan (12–16 years vs 9–10 years), and care requirements.

Which breed is better with kids, American Staffordshire Terrier or Newfoundland?

American Staffordshire Terrier is generally good with kids. Newfoundland is generally good with kids.

Which breed lives longer, American Staffordshire Terrier or Newfoundland?

The American Staffordshire Terrier has a lifespan of 12–16 years while the Newfoundland has a lifespan of 9–10 years.

American Staffordshire Terrier vs Newfoundland — Breed Comparison

About the American Staffordshire Terrier

The American Staffordshire Terrier — often called the AmStaff — was developed in the United States from crosses between Bulldogs and Terriers, earning AKC recognition in 1936. They stand 17–19 inches at the shoulder and weigh 40–70 pounds, presenting a stocky, muscular build that radiates power and confidence. Their short, stiff coat comes in a wide variety of colors and patterns, including blue, fawn, brindle, and black, and requires only minimal grooming.

Temperament & Personality

AmStaffs are known for their courage, intelligence, and unwavering loyalty to their families — they are genuinely affectionate dogs who love being at the center of household activities. They are typically excellent with children and are known for their patience and tolerance with youngsters. Proper socialization from puppyhood is critical, as they can be assertive with other dogs, and their strength demands a handler who can provide calm, confident leadership.

Pros

Incredibly loyal and protective of their family without being overly aggressive
Smart and highly trainable — they excel in obedience, rally, and therapy work
Short coat makes grooming a breeze
Sturdy and athletic, perfect for active families who enjoy outdoor activities

Cons

May face breed-specific legislation and insurance restrictions
Requires early and ongoing socialization with other dogs and animals
Prone to hip dysplasia, cardiac disease, and skin allergies
Their strong jaws and determination mean they can destroy toys and furniture quickly

AmStaffs make incredible family companions when given the right home — search for adoptable American Staffordshire Terriers on Puplister.

About the Newfoundland

The Newfoundland hails from the Canadian island of the same name, where it was bred as a working dog for fishermen — hauling nets, carrying boat lines, and even rescuing drowning swimmers. Males typically weigh 130 to 150 pounds and stand 28 inches tall, while females are slightly smaller at 100 to 120 pounds. Their thick, water-resistant double coat comes in black, brown, gray, or the striking black-and-white "Landseer" pattern.

Temperament & Personality

Newfoundlands are renowned for their sweet, patient, and devoted temperament — often called "nanny dogs" for their extraordinary gentleness with children. They are calm indoors, deeply loyal, and have an almost instinctive drive to rescue people in water. Newfies generally get along beautifully with other dogs and pets, making them exceptional family dogs despite their enormous size.

Pros

Exceptional natural swimming ability and water rescue instincts
One of the gentlest giant breeds — outstanding with children
Calm and easygoing indoor demeanor despite massive size
Highly trainable and responsive to gentle, patient guidance

Cons

Heavy drooling — especially after eating, drinking, or exercise
Coat requires extensive grooming and sheds heavily year-round
Prone to hip and elbow dysplasia, subvalvular aortic stenosis, and cystinuria
Shorter lifespan of 8 to 10 years common in giant breeds

A Newfoundland could be the most loving addition your family ever makes — find one waiting for a home on Puplister.

American Staffordshire Terrier vs Newfoundland