General Appearance
Smooth-coated, fairly thick set, rather low in stature, broad, powerful and compact. Head, fairly large in proportion to size but no point so much in excess of others as to destroy the general symmetry, or make the dog appear deformed, or interfere with its powers of motion. Face relatively short, muzzle broad, blunt and inclined upwards although not excessively so. Dogs showing respiratory distress highly undesirable. Body fairly short, well knit, limbs stout, well muscled and in hard condition with no tendency towards obesity. Hindquarters high and strong. Bitches not so grand or well developed as dogs.

Characteristics
Conveys impression of determination, strength and activity.

Temperament
Alert, bold, loyal, dependable, courageous, fierce in appearance, but possessed of affectionate nature.

Head and Skull
Skull relatively large in circumference. Viewed from front appears high from corner of lower jaw to apex of skull; also broad and square. Cheeks well rounded and extended sideways beyond eyes. Viewed from side, head appears very high and moderately short from back to point of nose. Forehead flat with skin on and about head slightly loose and finely wrinkled without excess, neither prominent nor overhanging face.  From defined stop, a furrow extending to middle of skull being traceable to apex. Face from front of cheek bone to nose, relatively short, skin may be slightly wrinkled. Muzzle short, broad, turned upwards and deep from corner of eye to corner of mouth. Nose and nostrils large, broad and black, under no circumstances liver colour, red or brown. Distance from inner corner of eye (or from centre of stop between eyes) to extreme tip of nose should not be less than distance from tip of the nose to edge of the underlip. Nostrils large wide and open, with well defined vertical straight line between. Flews (chops) thick, broad and deep, covering lower jaws at sides, but joining underlip in front. Teeth not visible. Jaws broad, strong and square, lower jaw slightly projecting in front of upper with moderate turn up. Over nose wrinkle, if present, whole or broken, must never adversely affect or obscure eyes or nose. Pinched nostrils and heavy over nose roll are unacceptable and should be heavily penalised.  Viewed from front, the various properties of the face must be equally balanced on either side of an imaginary line down centre.

Eyes
Seen from front, situated low down in skull, well away from ears. Eyes and stop in same straight line, at right angles to furrow. Wide apart, but outer corners within the outline of cheeks. Round, of moderate size, neither sunken nor prominent, in colour very dark – almost black – showing no white when looking directly forward. Free from obvious eye problems.

Ears
Set high – i.e. front edge of each ear (as viewed from front) joins outline of skull at top corner of such outline, so as to place them as wide apart, as high and as far from eyes as possible. Small and thin. ’Rose ear‘ correct, i.e. folding inwards back, upper or front inner edge curving outwards and backwards, showing part of inside of burr.

Mouth
Jaws broad and square with six small front teeth between canines in an even row. Canines wide apart. Teeth large and strong, not seen when mouth closed. When viewed from front under jaw directly under upper jaw and parallel.

Neck
Moderate in length, thick, deep and strong. Well arched at back, with some loose, thick and wrinkled skin about throat, forming slight dewlap on each side.

Forequarters
Shoulders broad, sloping and deep, very powerful and muscular giving appearance of being ’tacked on‘ body. Brisket round and deep. Well let down between forelegs. Ribs not flat-sided, but well rounded. Forelegs very stout and strong, well developed, set wide apart, thick, muscular and straight, bones of legs large and straight, not bandy nor curved and short in proportion to hindlegs, but not so short as to make back appear long, or detract from dog’s activity. Elbows low and standing well away from ribs. Pasterns short, straight and strong.

Body
Chest wide, prominent and deep. Back short, strong, broad at shoulders. Slight fall to back close behind shoulders (lowest part) whence spine should rise to loins (top higher than top of shoulder), curving again more suddenly to tail, forming slight arch – a distinctive characteristic of breed. Body well ribbed up behind with belly tucked up and not pendulous.

Hindquarters
Legs large and muscular, slightly longer in proportion than forelegs. Hocks slightly bent, well let down; legs long and muscular from loins to hock. Stifles turned very slightly outwards away from body.

Feet
Fore, straight and turning very slightly outward; of medium size and moderately round. Hind, round and compact. Toes compact and thick, well split up, making knuckles prominent and high.

Tail
Set on low, jutting out rather straight and then turning downwards. Round, smooth and devoid of fringe or coarse hair. Moderate in length – rather short than long – thick at root, tapering quickly to a fine point. Downward carriage (not having a decided upward curve at end) and never carried above back.

Gait/Movement
Appearing to walk with short, quick steps on tips of toes, hind feet not lifted high, appearing to skim ground, running with one or other shoulder rather advanced. Soundness of movement of the utmost importance.

Coat
Fine texture, short, close and smooth (hard only from shortness and closeness, not wiry).

Colour
Whole or smut, (i.e. whole colour with black mask or muzzle). Only whole colours (which should be brilliant and pure of their sort) viz., brindles, reds with their various shades, fawns, fallows etc., white and pied (i.e. combination of white with any of the foregoing colours). Dudley, black and black with tan highly undesirable.

Size
Dogs: 25 kgs (55 lbs); bitches: 23 kgs (50 lbs).

Faults
Any departure from the foregoing points should be considered a fault and the seriousness with which the fault should be regarded should be in exact proportion to its degree and its effect upon the health and welfare of the dog.

Note
Male animals should have two apparently normal testicles fully descended into the scrotum.

Source Kennel Club UK. Revised  October 2009.