I actually have one, need a pic?
We call ours a "Jack Shitz"! (Minus the z...it wouldn't let me use the word without the z.
A Jack Russell is a breed of terrier.
Some mixed breeds of dogs include the jack-chi, which is a Jack Russell terrier Chihuahua mix. Another mixed breed is the Goldador which is a Golden retriever and Labrador mix.
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.
chihuahua mixed dogs with jack russells are a ittle bigger then a normal sized chihuahua pretty much they are the size of a jack russlle. also you can look at pics they are very cute.
Jack daniel
The Parsons Jack Russell Terrier is an official dog breed so, therefore, a Jack Russell can be a purebred dog.
Possibly another Jack Russell.
Jack Russell Terrier
There is probably something wrong with it. Take your dog to your vet.
Jack Russell Terrier
No they are in the Small Breed group.