top of page

Jack Russell Terrier

GENERAL APPEARANCE : Strong, active and agile working Terrier, with great character, flexible body and of medium length. His smart movements match his sharp expression. A docked tail is optional and the coat can be smooth, rough or broken.

Personality:  Active, alert and agile.
Energy Level : Very Active.  This dog is active and energetic, and needs daily exercise. 
Good with children:  Yes.

Good with other dogs:  With supervision.

Grooming:  Seasonal.

Life Expectancy : 13-16  years old.

Bark level:  High.


The Jack Russell Terrier originated in England in the 1800s thanks to the efforts of Reverend John Russell. He developed a lineage of Fox Terriers to satisfy his needs for a dog to run with his Foxhounds and go to the ground to chase the fox and other small animals out of their burrows. Two varieties were involved, basically with similar patterns, except for some differences, mainly in height and proportions. The tallest and most square-built dog is known as the Parson Russell Terrier; and the smaller, proportionately slightly longer, is known as the Jack Russell Terrier.

Country of Origin: England.

BEHAVIOR AND TEMPERAMENT:  Full of life, alert and active, with a sharp, intelligent expression. Brave and fearless, friendly but calmly confident.



Skull: The skull should be flat and of moderate width, gradually decreasing in width towards the eyes and narrowing towards the muzzle.

Stop : Well defined.



Snout:  The length from the stop to the nose should be slightly shorter than the length from the stop to the occiput.  

Truffle:  black.

Jaws and Teeth:  Scissor bite with strong jaws and teeth.

Lips: Close-fitting.


Eyes: Dark and small, almond-shaped, and the eyelids should be close. They must not be prominent.  

Ears : Dropped or in buttons.

NECK :  Long neck, strong and without bardelas.


Top Row: Level.

Straight  and well developed.

Chest:  Deeper than wide, with good ground clearance, allowing the tip of the sternum to be located midway between the ground and the withers. Ribs well sprung from the spine, flattening at the sides so that the girth behind the elbows can be measured by two hands.

TAIL: May be curved at rest. In motion, it should be erect and, if cut, the tip should be at ear level.




Shoulders: Well laid back and not loaded heavily with muscles.

Elbows: Close to the chest.

Feet: Round, hard, padded, not large; fingers moderately arched, turning neither in nor out.


Hocks: Well angulated.

  Well developed.

Paws :  Round, hard, padded, not large; fingers moderately arched, turning neither in nor out.

  • GAIT/MOVEMENT: Correct, free and elastic.

  • COAT

Hair : They can be of three types: smooth, broken or rough.  

  • COLOR: white  should be predominant, with black and/or brown (“tan”) spots. Brown markings can have varying shades.

SIZE: At the withers -  25 cm to 30 cm.

WEIGHT: 5kg to 6kg

  • FAULTS  

Any deviation from this standard should be considered a fault and penalized in exact proportion to its severity and its effects on the health and well-being of the dog.  



• Aggressiveness or excessive shyness.

• Any dog that shows any sign of physical or behavioral anomaly must be disqualified.

• Atypical dogs.

bottom of page