The Russell Terrier is sturdy, confident, and lively. The overall profile of this breed should be rectangular in proportion, with length slightly greater than height. The skull is flat, with a wide muzzle that narrows slightly to the end. The stop is well defined and the nose needs to be black and fully pigmented. The ears can be V-shaped button, or dropped—both are carried close to the head. The eyes should be dark, almond shaped, and rimmed with black. The Russell Terrier should have an alert expression, a scissors bite, and black lips. The neck should be long enough to let the terrier's mouth extend beyond its forepaws when working.
The forelegs are straight and moderately well boned. The loins are short and muscular. The top line stays level while in motion. The chest is small, oval shaped, and compressible to allow the dog to work below ground. The hindquarters are strong. All four feet should be moderately sized, oval shaped, and hard padded, with toes that are moderately arched. The tail is set high enough so the spine does not slope down to the base of the tail. Movement should appear effortless and confident.
The coat can be smooth (dense, short, smooth hair), broken (intermediate-length hair, usually with facial furnishings and a slight ridge down spine), or rough (harsh, dense hair), but always has an undercoat and harsher outer coat for weather proofing. Any variation of tan and/or black markings (against a white background) is acceptable; brindle is not. History:
A descendant of the Rev. John Russell's early-nineteenth-century fox-working terriers, the Russell Terrier also was bred for fox hunting. Though they look small for such sport, they were actually just the right size to be carried across difficult terrain on horseback (in "terrier bags"). The dog’s sharp nose and loud voice were perfect for finding and then "bolting" the fox.
The breed was further developed in Australia, where it came to be called the Jack Russell Terrier. In America, that same dog is called the Russell Terrier and considered a distinctly different breed than the longer-legged breed called the Jack Russell Terrier or Parson Russell Terrier in the United States.