Personality and Temperament
The energetic Jack Russell is a small dog with lots of personality. He is friendly with people, but we mustn’t forget that he’s a terrier which means he could be a bit short-tempered with other dogs, so his fearless nature can sometimes get him into trouble when he decides to confront a bigger dog.
He is extremely used to having a daily structure and routine, but training sessions (if given them), should be short to keep interest levels up. Repetition bores him. A good Jack Russell is friendly and affectionate and not at all shy.
Like all dogs, the Jack Russell needs to socialize from an early age and have exposure to lots of different people, images, sounds and experiences when it is still a puppy. This will help to ensure that the Jack Russell puppy grows into a healthy, happy dog.
As with any species, the life expectancy of a Jack Russell varies greatly depending on his lifestyle, feeding habits and physical state. Although there is no exact method to assure that these animals live a long life, Jack Russells are usually a healthy, robust breed living somewhere between 10 and 15 years.
Weight and Average Size
Strong, agile and flexible, of average length, and although they are compact, small dogs they have tremendous stamina. They are rarely more than 25cm tall to their withers, and their ideal weight should be 1kg per 5cm in height (a dog of 20cm tall should weigh around 4kg).