Jack Russell Terrier Information
The Jack Russell Terrier developed in southern England nearly 200 years ago. They are the result of crossings of the now extinct Old English White Terrier and a black and tan terrier that was similar in type to the Manchester Terrier.
They have been bred for over 100 years as the working man's terrier. They have proven to be invaluable as a fox hunting dog to the terrier-men who have been working the hunts for years in England.
Due to the popularity of the Jack Russell Terrier, the breed changed. The hunting ability in many of the dogs had literally been bred out of them and the structure of the dogs literally was altered. These changed dogs are now known as the Parson Russell Terrier. The Parsons have straightened shoulders, long and narrow jaws and their chests are deepened. With these structural changes, their chests were too deep to be able to go to ground after the fox. Many breeders who adored the original Jack Russell Terrier, did not breed for this new structure and still have true Jack Russell Terriers that are more than capable of hunting.
The Jack Russell Terrier is adaptable to many environments. They are bred to be hunting dogs, so city living usually does not meet their needs, however if given ample opportunities to vent their energy and hunt, they may be able to adapt to the lifestyle. They require a great deal of human interaction, exercise and outdoor activity. If you are not able to keep up with the demands of a Jack Russell Terrier, a Parson Russell Terrier may be more suitable for your lifestyle.
Jack Russell Terriers can be aggressive with other dogs as well as other small animals such as cats. They are true working terriers in every sense. They are fearless and if they see a fleeing creature such as a rabbit or squirrel they will do whatever possible to get to it. They can easily dig under or climb a fence, so you must be sure that the fence is at least 6 to 7 feet tall and also be partly underground. Many can easily climb chain link fencing and even climb trees.
Jack Russell Terriers should stand between 10 to 15 inches tall, with a shallow, narrow chest. They should have an athletic appearance. Their coat should be smooth, rough or broken coated.
Health concerns include Progressive Retinal Atrophy and luxating patella.
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