Deriving its name from Dr David Brian Plummer, the breed's creator, the Plummer Terrier was primarily bred to hunt ground vermin and serve as an all-purpose working dog. Developed in the 1960s in the Midlands, the Plummer Terrier combines Jack Russell Terrier, Beagle, and red Fell Terrier blood, with a Bull Terrier being crossed in later, much to many fancier's distaste. The Plummer was highly valued for its acute senses and game temperament, although many criticized its size and appearance, suggesting it was too large to access den quarry, and was a genetic monster, boasting ugly and undesirable traits. Such characteristics have been selectively bred out of the Plummer, perhaps by removing outcrosses from the mix. Not a recognised Kennel Club breed.
The breed standard describes how the Plummer should have the anatomy of a sporting terrier, with a strong jaw, robust legs, a flexible spine and a short, close-lying coat. Additionally, the Plummer Terrier should have a narrow chest, allowing it to maneuver into tight spaces when on the hunt, high-set ears, a defined muzzle and a slightly sloping topline. The coat is typically red with white or tan markings, having descended from the red Fell Terrier, which was incorporated in its development for aesthetic value. Otherwise, the Plummer Terrier should possess a willing and fearless attitude, whilst being highly trainable and responsive.
Rarely seen in the domestic setting, the Plummer Terrier is commonly utilised as a pack dog, hunting vermin and rabbits as part of a sporting group. This has no bearing on its character, with the Plummer being an adaptable and affectionate breed, well suited to active family life. With a natural tendency to display stubborn and strong-willed behaviours, the Plummer Terrier benefits from firm leadership, early socialisation and consistent training in order to achieve its pleasing potential. On average, a fully grown Plummer Terrier will weigh 6-8 kg, with a life expectancy of 12-15 years.
Due to the relative rarity of the breed, any genetic or breed-specific diseases are difficult to determine. Patellar luxation and related orthopedic complaints have been identified in the breed, although not with any great recurrence.