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Dog · FCI group 3

Jack Russell Terrier

The Jack Russell Terrier is an energetic, compact working terrier developed for tracking and flushing game. The breed possesses high intelligence, an intense prey drive, and a fearless temperament. It requires vigorous physical exercise and consistent mental stimulation to thrive.

  • bold
  • alert
  • fearless
  • active
  • friendly
  • vocal
Jack Russell Terrier
OriginAustralia
Size
Small
Adult weight
5 to 6 kg
Height at the withers
25 to 30 cm
Lifespan
12 to 16 years

This is general guidance. Always ask your vet.

How big does a Jack Russell Terrier get?

An adult Jack Russell Terrier weighs 5 to 6 kg and stands 25 to 30 cm at the withers.

The FCI standard establishes an ideal weight ratio of 1 kg for every 5 cm of height at the withers. Chest girth behind the elbows measures between 40 cm and 43 cm so two hands can span the body.

[S1][S2][S7]

How long does a Jack Russell Terrier live?

A Jack Russell Terrier lives 12 to 16 years.

Large veterinary cohort studies in the UK record median survival times between 12.72 and 13.3 years.

[S15][S16][S17][S18]

What health problems are common in the Jack Russell Terrier?

The most common in the Jack Russell Terrier are: Primary Lens Luxation (PLL), Patellar Luxation, Late Onset Ataxia (LOA), Spinocerebellar Ataxia with Myokymia (SCA / SAMS), Congenital Sensorineural Deafness, Legg-Calvé-Perthes Disease.

Between 3 and 8 years of age

Primary Lens Luxation (PLL) [S27][S28][S29][S30]

An inherited condition where the fibers supporting the eye lens break down, causing the lens to shift out of place.

Ask your vet about:

  • DNA genetic test for the ADAMTS17 mutation
  • Annual CAER or CERF eye examination by a veterinary ophthalmologist

Patellar Luxation [S31][S32]

A skeletal disorder in which the kneecap slips out of its normal groove in the femur.

Ask your vet about:

  • Orthopedic physical palpation of the stifle joints
  • OFA patellar evaluation after 12 months of age
Between 6 and 12 months of age

Late Onset Ataxia (LOA) [S33][S34][S35][S36]

A progressive neurological disorder that damages balance and gait coordination.

Ask your vet about:

  • DNA marker testing for the CAPN1 gene mutation
Between 2 and 6 months of age

Spinocerebellar Ataxia with Myokymia (SCA / SAMS) [S34][S37]

A hereditary neurological disease leading to poor coordination, muscle twitching, or collapse.

Ask your vet about:

  • Direct DNA genetic test for the homozygous KCNJ10 mutation

Congenital Sensorineural Deafness [S21][S32]

Inherent hearing loss present in puppies, often linked to white coat pigmentation.

Ask your vet about:

  • Brainstem Auditory Evoked Response (BAER) hearing test

Legg-Calvé-Perthes Disease [S32][S38]

Spontaneous necrosis and collapse of the head of the femur bone in the hip joint.

Ask your vet about:

  • Pelvic radiographs (X-rays) evaluated by a veterinarian or submitted to the OFA hip registry

What is a Jack Russell Terrier's temperament like?

The Jack Russell Terrier is bold, lively, and alert with an intense hunting instinct. It bonds closely with its family but shows high excitability and strong determination.

[S1][S5][S6][S18][S19]

How much exercise does a Jack Russell Terrier need?

A Jack Russell Terrier needs 60 to 90 minutes of exercise a day.

This dog requires daily vigorous physical exercise along with structured mental challenges and problem-solving activities to prevent destructive behaviors such as digging, chewing, and excessive barking.

  • Energy5 / 5
[S18][S19][S20][S21][S22]

How does a Jack Russell Terrier handle heat and cold?

An athletic build and medium muzzle aid cooling, but extended activity above 28°C to 30°C raises the risk of heat exhaustion. White coat sections and unpigmented skin are prone to sunburn under direct sunlight.

  • Handles heat3 / 5
  • Handles cold3 / 5
[S23]

How much does a Jack Russell Terrier shed, and how do you groom it?

All coat varieties shed year-round with heavier shedding in spring and autumn. Smooth coats require weekly brushing with a rubber curry brush. Rough and broken coats need weekly combing and hand-stripping two to three times per year to maintain hair texture.

smooth, rough, or broken with a weather-resistant undercoat

  • Shedding4 / 5
[S1][S21][S24]

Is a Jack Russell Terrier good with children and other pets?

The breed fits best with children who understand proper handling and boundaries. A strong prey drive makes living with small pets unsafe, and it can show dog reactivity. Apartment living demands multiple hours of daily outdoor activity to curb vocal baying and high reactivity.

  • With children3 / 5
  • With other pets2 / 5
  • In an apartment2 / 5
[S11][S18][S21][S25]

Is a Jack Russell Terrier easy to train?

The breed learns quickly through high working intelligence but loses interest during repetitive drills. It responds best to positive reinforcement and requires early bite inhibition and impulse control.

  • Ease of training3 / 5
[S19][S26]

What does a Jack Russell Terrier eat at each life stage?

  • PuppyFeed a nutrient-dense, high-protein formula certified for small-breed growth until 10 to 12 months old. The diet should supply balanced calcium-to-phosphorus ratios and docosahexaenoic acid (DHA) for bone and brain development.
  • AdultProvide an adult maintenance diet tailored for active small breeds. Monitor intake and adjust feeding to exercise levels to maintain lean muscle mass and prevent excess weight gain.
  • SeniorSelect a senior formula with controlled calories to match a slower metabolism. Look for increased digestible fiber for digestion, alongside omega-3 fatty acids and joint-supporting nutrients.

Where does the Jack Russell Terrier come from?

Reverend John Russell started breeding these working terriers in England during the early 19th century to accompany foxhounds and bolt foxes from underground burrows. The foundation dam was a white female named Trump, acquired around 1819. While the breed began in England as a baying terrier, the low-to-ground modern form was formally developed and standardized in Australia.

Country of origin: Australia.

[S1][S2][S3][S4][S5][S6][S7][S8]

Fun facts about the Jack Russell Terrier

  • A Jack Russell named Bothie became the first and only dog to set foot on both the North and South Poles during the Transglobe Expedition. [S43][S44]
  • A terrier named Moose earned $10,000 per episode playing Eddie on the television sitcom Frasier and received more fan mail than his human co-stars. [S12]
  • A Jack Russell named Max played Milo in the 1994 movie The Mask, driving an international surge in breed popularity. [S6]
  • An adult Jack Russell Terrier can leap vertically up to 1.5 meters, clearing more than four times its own shoulder height. [S22]
  • A comprehensive UK VetCompass study showed the Jack Russell Terrier had the highest life expectancy at birth among all analyzed dog breeds at 12.72 years. [S15][S45]

Tips by life stage and weather

  • PuppyStart early bite inhibition and structured crate training to teach your puppy boundaries and self-control.
  • PuppyIntroduce controlled socialization with cats and novel sights during puppyhood to manage the breed's natural prey drive.
  • AdultKeep your dog on a leash in open areas, as their tracking instinct can cause them to bolt after scents.
  • AdultIncorporate dog sports like agility, barn hunt, or scent games into your routine to fulfill working drive and burn energy.
  • SeniorSchedule regular wellness checkups with your veterinarian to assess joint mobility and monitor aging eyes.
  • SeniorMaintain daily low-impact exercise and puzzle toys to keep joints flexible and mental faculties sharp.
  • Hot seasonWalk your dog during early mornings or late evenings to avoid outdoor temperatures exceeding 28°C.
  • Hot seasonProtect unpigmented skin on the ears, nose, and belly from intense direct sunlight during sunny afternoons.
  • Cold seasonLimit prolonged stationary time outdoors during chilly spells, especially for smooth-coated dogs.
  • Cold seasonProvide dry, insulated bedding away from drafts inside the home to keep your terrier warm.
  • Rainy seasonEngage your dog with indoor scent games and interactive puzzle toys when outdoor downpours prevent exercise.
  • Rainy seasonDry your dog's coat thoroughly after wet walks to maintain skin health and protect the natural undercoat.

In the Kiba Vet app, your pet's breed profile shows a tip of the day based on its age and the weather where you live.

This is general guidance. Always ask your vet.

Checked against sources; veterinary review pending. Updated on September 29, 2026.

Written with the help of AI from the cited sources and checked fact by fact against them by a second model.

Sources

Every health fact and every number on this page comes from these sources. Identifiers from Wikidata (CC0).