Jack Russell Terrier Information, A Little Dog with a Big Personality Why This Breed is So Beloved

Jack Russell Terriers photo
Small Breed X-Small Breed Patella Luxation Epilepsy Skin Allergies Jack Russell Terrier

Is The Jack Russell Terrier Dog Right For You?

  • 1 Jack Russell Terriers can be a handful with their demand for attention and restless behavior.
  • 2 Although small in size, they are lively, courageous, and at times aggressive.
  • 3 Untrained Jack Russell Terriers cannot be left alone: their destructive nature and require an owner who enjoys activity.


Named for the Reverend responsible for breeding them, the Jack Russell Terrier was first bred in the 19th century to help the Rev. John Russell with his fox hunts, needing a terrier with slightly longer legs in order to keep up with the hounds, but still small enough to root the fox out of their den. Since the emphasis has been placed on the working ability of the Jack Russell, the breed has been split into two groups, the Jacks, which are the working type, and the Parson Russell Terriers, which are the breeds that go to shows.

Quick Facts

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    15 or more years

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    Hair Length


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    Male Height

    10 - 12 inches (25 - 31 cm.)

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    Male Weight

    14 -18 pounds (6 - 8 kg.)

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    Female Height

    10 - 12 inches (25 - 31 cm.)

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    Female Weight

    14 -18 pounds (6 - 8 kg.)

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    Litter Size

    4 - 8 puppies, average 6 puppies


Even though the Jack Russell Terrier is a small dog, they have a huge personality. So big, in fact, that without the proper leadership they will become unruly and rambunctious. They are incredibly bright, loving, and loyal dogs and they are great with kids so long as the kids play nice, but they should not be left alone with other, smaller pets. If they are allowed to think that they are pack leader, this could result in certain detrimental behaviors, such as snapping, excessive barking, and guarding areas they believe to be โ€˜theirs.โ€™ They also require a fair amount of exercise, otherwise they might become restless. .


Jack Russell Terriers can range from black to tan, brown and tan, black and brown, tan and red, or white and tan.

Health Concerns

Jack Russell Terrier has a lifespan of 15 years. Normally healthy, the breed is susceptible to:


This small but well-proportioned hunter is just over a foot tall, so as to fit into burrows when on a hunt. They weigh somewhere in the neighborhood of 30 pounds and are relatively sturdy and tough for their size. Their head should be in proportion with the rest of their body, with a flat skull that is wider towards the ears and narrows towards the eyes. Their muzzle tapers down to a tiny black nose, with a powerful jaw.

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