Jack Russell Terriers tend to shed a lot throughout the year.These dogs have all the positive and negative traits of standard Jack Russells.The AKC does not accept black Jack Russells as purebred dogs.Black Jack Russell Terriers can be created by mixing a Jack Russell with another breed.One gene responsible for the black coat of dogs is in the K locus.The only official color for Jack Russell Terriers is white.What Is The Personality Of A Black Jack Russell Terrier?.What Does A Black Jack Russell Terrier Look Like?.But there are reasons why people choose to own this beautiful black dog. This version of the Jack Russell is very rare and is made only through specific breeding practices. Yet, not many people know that a Black Jack Russell Terrier exists. It is known to have a white coat with black and tan markings. The Jack Russell Terrier is a fun little dog owned by many dog owners in the world.