Jack Russell Terrier
Terrier Group (AKC), Terrier Group (KC) · England — developed in the early 19th century by the Reverend John Russell for fox hunting purposes. · Small
Also known as: JRT, Jack, Parson Russell Terrier (related), Russell Terrier (short-legged variant)
Breed Group
Terrier Group (AKC), Terrier Group (KC)
Size
Small
Height
10-15 inches at the shoulder.
Weight
13-17 lbs on average.
Life Expectancy
13-16 years.
Origin
England — developed in the early 19th century by the Reverend John Russell for fox hunting purposes.
Energy Level
Very High — they are tireless workers that require significant daily physical and mental enrichment to prevent destructive behavior.
Trainability
Moderate — they are extremely smart but independent and can be stubborn. They require consistent, positive-reinforcement training and a firm leader.
Description
A sturdy, tough, and agile terrier built for work. They have a rectangular body shape, a keen expression, and a high-set tail that is often carried upright.
Key Features
V-shaped ears that fold forward, almond-shaped dark eyes, a predominantly white coat with patches, and a 'button' ear carriage that stays close to the head.
Coat Type
The breed comes in three types: smooth (short), broken (intermediate), and rough (long/wiry). All are double-coated and weatherproof; shedding is moderate year-round.
Coat Colors
Predominantly white (at least 51%) with black, tan, or brown markings. The puppy in the image shows classic tan/tricolor facial markings on a white base with some ticking/spotting on the muzzle.
Temperament
Energetic, fearless, vocal, and highly intelligent. They are known for being tenacious hunters with a big personality that belies their small size.
Good with Children
Good — generally better with older children who understand how to respect a dog's boundaries. They can be 'mouthy' during play.
Good with Other Dogs
Fair — they can be scrappy or assertive with other dogs. Early socialization is critical to ensure they get along with peers.
Grooming Needs
Low to Moderate — smooth coats need weekly brushing; rough and broken coats require manual 'stripping' twice a year to remove dead hair.
Exercise Requirements
High — needs at least 60-90 minutes of active exercise daily, including running, fetch, and scent work or agility training.
Health Considerations
Generally healthy; common issues include Patellar Luxation, deafness (in white dogs), and eye conditions like Primary Lens Luxation.
Living Conditions
Adaptable to apartments if very well-exercised, but ideally suited for homes with a secure yard. Their high prey drive means they should always be leashed or fenced.
History & Origin
Bred by Reverend John 'Jack' Russell in Devonshire, England, specifically to bolt foxes from their dens so hounds could chase them. They were valued for their stamina and white coats which made them visible in the field.
Interesting Facts
A Jack Russell named Moose played 'Eddie' on the hit TV show Frasier, and another named Uggie starred in the Oscar-winning film The Artist.
Similar Breeds
Parson Russell Terrier (longer legs, more square build), Rat Terrier (larger ears, different coat patterns), Fox Terrier (distinctive long head shape).