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A Jack Russell is a breed of terrier.
The Parsons Jack Russell Terrier is an official dog breed so, therefore, a Jack Russell can be a purebred dog.
Jack Russell Terrier
Jack Russell terrier also called parson Russell terrier.
Jack Russell Terrier
the average is 13-16 years they are a long lived breed
Possibly another Jack Russell.
jack russell terrier
The Jack Russell is a smaller version of a Fox terrrier. A Fox terrier is derived from a wolf. I belive they just kept breeding small-legged Fox terriers until they got the Jack Russell terrier.
A breed of dog meant to hunt and kill vermin.
The 'breed' is Jack Russell Terrier
Billie Piper's dog is a Jack Russell Terrier.