Jack Russell Terrier vs Saint Bernard

Which dog breed is right for you?

Jack Russell Terrier

Size
13–17 lbs, 10–15 in
Lifespan
13–16 years
Exercise
Very High
Grooming
Low
Good with Kids
Yes
Good with Pets
No
Energetic Fearless Clever Athletic

Saint Bernard

Size
120–180 lbs, 26–30 in
Lifespan
8–10 years
Exercise
Moderate
Grooming
Moderate
Good with Kids
Yes
Good with Pets
Yes
Gentle Patient Watchful Friendly

About the Jack Russell Terrier

The Jack Russell Terrier was developed in 19th-century England by Reverend John Russell, who bred a strain of fox-working terriers designed to bolt foxes from their dens without injuring them. Standing 10–15 inches tall and weighing 13–17 pounds, these compact, muscular terriers have a predominantly white coat — smooth, rough, or broken — with tan, black, or tricolor markings. Their small size is deceptive — Jack Russells pack the energy, drive, and determination of a dog twice their size into a remarkably athletic frame.

Temperament & Personality

Jack Russell Terriers are fearless, intense, and almost comically confident — they live life at full throttle and expect their owners to keep up. They are clever problem-solvers with an independent streak that makes them entertaining but challenging to manage for inexperienced owners. While loyal and affectionate with their families, their terrier temperament means they can be snappy with young children and combative with other dogs.

Pros

  • Exceptional athleticism — excel in agility, flyball, and barn hunt competitions
  • Hardy, healthy breed with a long lifespan of 13–16 years and few genetic health issues
  • Small enough for apartment living but robust enough for outdoor adventures
  • Alert and vigilant watchdogs — nothing escapes their notice

Cons

  • Astonishing energy level — requires far more exercise than most owners expect from a small dog
  • Can jump up to 5 feet high and dig under fences — expert escape artists
  • Strong prey drive and aggression toward small animals — not safe with cats, rabbits, or rodents
  • Stubborn and independent — can be difficult to train despite high intelligence

If you want a small dog with a big personality and boundless energy, search Jack Russells on Puplister.

About the Saint Bernard

The Saint Bernard originated in the Swiss Alps at the Great St. Bernard Hospice, where monks bred these massive dogs for over 1,000 years to locate and rescue travelers lost in snowstorms along the treacherous mountain pass. Males typically stand 28 to 30 inches tall and weigh 140 to 180 pounds, though individuals exceeding 200 pounds are not uncommon. Their coat comes in two varieties — short-haired (smooth) and long-haired (rough) — both in white with red, mahogany, brindle, or brown markings.

Temperament & Personality

Saint Bernards are gentle, patient, and extraordinarily tolerant — their legendary devotion to humans extends to being remarkably careful and nurturing around children despite their massive size. They are friendly with strangers, other dogs, and household pets, possessing a calm, unflappable demeanor that makes them wonderful therapy dogs. While not aggressive, their sheer size and deep bark are often enough to deter unwanted visitors.

Pros

  • Exceptionally gentle and patient — one of the best giant breeds for families with children
  • Calm, low-energy indoor demeanor despite enormous size
  • Friendly and non-aggressive toward people and other animals
  • Imposing presence provides natural deterrent without guard training

Cons

  • Legendary drooling — especially the loose-lipped, heavy-jowled individuals
  • Short lifespan of 8 to 10 years, with some living even less
  • Prone to hip and elbow dysplasia, bloat, osteosarcoma, and dilated cardiomyopathy
  • Enormous food costs and substantial space requirements for comfortable living

Few breeds embody devotion quite like the Saint Bernard — find one in need of a loving home on Puplister.

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Frequently Asked Questions

What is the difference between a Jack Russell Terrier and a Saint Bernard?
The Jack Russell Terrier is 13–17 lbs, 10–15 in sized while the Saint Bernard is 120–180 lbs, 26–30 in sized. They differ in size (13–17 lbs, 10–15 in vs 120–180 lbs, 26–30 in), lifespan (13–16 years vs 8–10 years), and care requirements.
Which breed is better with kids, Jack Russell Terrier or Saint Bernard?
Jack Russell Terrier is generally good with kids. Saint Bernard is generally good with kids.
Which breed lives longer, Jack Russell Terrier or Saint Bernard?
The Jack Russell Terrier has a lifespan of 13–16 years while the Saint Bernard has a lifespan of 8–10 years.

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