Origin and Historical Background

The Jack Russell Terrier, a British breed, originated from the early nineteenth century in North Devon, England. Bred by Reverend John "Jack" Russell, a country parson and hunting enthusiast, the dogs were initially used for fox hunting. The breed's name is derived from its founder, and it has similar origins to the modern Fox Terrier. The Reverend Russell purchased a small white and tan terrier named Trump, which became the foundation for his breeding program. Trump was known for her white coat with dark tan patches over the eyes and ears, and a small dark dot at the tail root.

By the 1850s, the dogs developed by John Russell were recognized as a distinct breed, known for their high stamina, courage, and the ability to chase out foxes that had gone to ground. However, due to financial difficulties, Russell was forced to sell most of his dogs, leaving only four aged terriers at his death in 1883. Despite this, the line of terriers developed by Russell was well-respected, and his dogs were often taken on by hunt enthusiasts.

After Russell's death, the breed continued to evolve, with two men, East and Archer, making significant efforts to continue the strains. Arthur Blake Heinemann, in 1894, founded the Devon and Somerset Badger Club, which aimed to promote badger digging and the breeding of terriers suitable for this purpose. The club later became the Parson Jack Russell Terrier Club, reflecting the breed's association with badger digging, which required a different type of dog than fox hunting.

Breed Characteristics

The Jack Russell Terrier is a small, energetic earth-working terrier, known for its predominantly white coat and sturdy build. They are athletic and lively, with a temperament that is energetic, intelligent, alert, courageous, confident, and playful. The breed stands at a height of 25-30 cm and weighs between 6-8 kg. Their coat length is medium, with a high energy level and moderate shedding. They are highly trainable and have a low level of friendliness, which makes them ideal for owners who can provide the necessary exercise and stimulation.

The Jack Russell Terrier has a variety of coat types, including smooth, rough, or a combination of both, known as a broken coat. The coloration is predominantly white, with black and/or brown and/or tan markings. Their head is of moderate width at the ears, narrowing to the eyes, with a slightly flat area between the ears. The eyes are almond-shaped and dark, full of life and intelligence. The ears are small and V-shaped, carried forward on the head, and the tail is set high.

The Jack Russell Terrier is a working terrier, originally bred to bolt foxes from their dens during hunts. They are used on ground-dwelling quarry such as groundhog, badger, otter, and red and grey fox.

Health Considerations

Due to their use in hunting, Jack Russell Terriers in the United States are prone to contracting skunk toxic shock syndrome. Other health conditions that may affect the breed include black hair follicular dysplasia, primary lens luxation, severe combined immunodeficiency (SCID), patellar luxation, inherited ataxia, steroid-responsive meningitis-arteritis, and Legg-Perthes syndrome. A study identified a mutation in the ADAMTS17 gene as being responsible for primary lens luxation, while the KCNJ10 gene has been linked to spinocerebellar ataxia accompanied by myokymia and/or seizures. A UK study found the Jack Russell Terrier to be predisposed to steroid-responsive meningitis-arteritis, with a significantly higher likelihood of contracting the disease compared to other breeds.

Early detection and treatment of health conditions can improve the quality of life for these dogs.

Breed Standards and Recognition

The Jack Russell Terrier has undergone several changes over the years, corresponding to different use and breed standards set by kennel clubs. The breed's recognition by kennel clubs has been opposed by the breed's parent societies, which resulted in the breeding and recognition of the Parson Russell Terrier. Despite this, the Jack Russell Terrier remains a distinct breed, with its own breed standard and registry.

Following World War II, the requirement for hunting dogs drastically declined, leading to a decrease in the number of Jack Russell Terriers. However, the breed gained popularity as family and companion dogs. The Jack Russell Terrier Club of America (JRTCA) was formed in 1976, promoting the breed's working ability and maintaining an open registry with restricted line breeding. The breed was recognized by the American Kennel Club (AKC) in 2001, with the name changed to Parson Russell Terrier to reflect its conformation show standard.

Several breed clubs appeared in the United Kingdom during the 1970s to promote the breed, including the Jack Russell Club of Great Britain (JRTCGB) and the South East Jack Russell Terrier Club (SEJRTC). The JRTCGB promoted the range of sizes that remain in its standards today, while the SEJRTC set a minimum height for dogs at 33 cm (13 in). The Parson Jack Russell Club of Great Britain (PJRTCGB) was resurrected in 1983 to seek Kennel Club recognition for the breed, which was granted in 1990.

Temperament and Behavior

Jack Russell Terriers are highly intelligent and energetic dogs, requiring a high level of exercise and stimulation. They are used to chasing and working, which makes them excellent for dog sports and activities. Their high energy level can be challenging for some owners, but it also means they are often very engaging and fun companions.

These dogs are alert and can be vocal, which is a trait that has served them well in their working history. They are not naturally friendly towards strangers, which can be a result of their hunting background.

Jack Russell Terriers can be stubborn and may require firm but gentle training. They respond well to positive reinforcement and enjoy challenges.

Buying a Jack Russell Terrier

• Health clearances: Ensure the dog has been tested for common genetic health conditions specific to the breed.
• Socialization: Look for a breeder who has exposed the puppies to various people, animals, and environments.
• Training: Consider a dog that has had some basic training and is ready to continue learning.
• References: Ask for references from other owners and check the breeder's reputation with local kennel clubs.
• Meet the parents: Spend time with the puppy's parents to get a sense of their temperament and health.