A blue heeler-Jack Russell terrier mix is a cross between the blue heeler, or Australian cattle dog, and the Jack Russell terrier. Like other mixed-breed dogs, the characteristics of this hybrid are unpredictable. The blue heeler-Jack Russell terrier mix can inherit a wide variety of traits from its pure-bred parents.
Both the blue heeler and the Jack Russell terrier are known for their compact builds and their intelligence, loyalty and bravery. In addition, both of these breeds can be very active. A cross between a blue heeler and a Jack Russell terrier would likely inherit these traits. The blue heeler is a medium-sized dog, capable of reaching 20 inches at the shoulder and weighing more than 60 pounds. The Jack Russell terrier reaches a maximum of 15 inches in height and weighs no more than 18 pounds.