The Cavalier King Charles Spaniel is an active, graceful, well-balanced toy spaniel, very gay and free in action; fearless and sporting in character, yet at the same time gentle and affectionate. It is this typical gay temperament, combined with true elegance and royal appearance which are of paramount importance in the breed. Natural appearance with no trimming, sculpting or artificial alteration is essential to breed type.
Proportionate to size of dog, appearing neither too large nor too small for the body. Expression - The sweet, gentle, melting expression is an important breed characteristic. Eyes - Large, round, but not prominent and set well apart; color a warm, very dark brown; giving a lustrous, limpid look. Rims dark. There should be cushioning under the eyes which contributes to the soft expression. Faults - small, almond-shaped, prominent, or light eyes; white surrounding ring. Ears - Set high, but not close, on top of the head. Leather long with plenty of feathering and wide enough so that when the dog is alert, the ears fan slightly forward to frame the face. Skull - Slightly rounded, but without dome or peak; it should appear flat because of the high placement of the ears. Stop is moderate, neither filled nor deep. Muzzle - Full muzzle slightly tapered. Length from base of stop to tip of nose about 1½ inches. Face well filled below eyes. Any tendency towards snipiness undesirable. Nose pigment uniformly black without flesh marks and nostrils well developed. Lips well developed but not pendulous giving a clean finish. Faults - Sharp or pointed muzzles. Bite - A perfect, regular and complete scissors bite is preferred, i.e. the upper teeth closely overlapping the lower teeth and set square into the jaws. Faults - undershot bite, weak or crooked teeth, crooked jaws.
Of moderate length, silky, free from curl. Slight wave permissible. Feathering on ears, chest, legs and tail should be long, and the feathering on the feet is a feature of the breed. No trimming of the dog is permitted. Specimens where the coat has been altered by trimming, clipping, or by artificial means shall be so severly penalized as to be effectively eliminated from competition. Hair growing between the pads on the underside of the feet may be trimmed.
Blenheim - Rich chestnut markings well broken up on a clear, pearly white ground. The ears must be chestnut and the color evenly spaced on the head and surrounding both eyes, with a white blaze between the eyes and ears, in the center of which may be the lozenge or "Blenheim spot." The lozenge is a unique and desirable, though not essential, characteristic of the Blenheim. Tricolor - Jet black markings well broken up on a clear, pearly white ground. The ears must be black and the color evenly spaced on the head and surrounding both eyes, with a white blaze between the eyes. Rich tan markings over the eyes, on cheeks, inside ears and on underside of tail. Ruby - Whole-colored rich red. Black and Tan - Jet black with rich, bright tan markings over eyes, on cheeks, inside ears, on chest, legs, and on underside of tail. Faults - Heavy ticking on Blenheims or Tricolors, white marks on Rubies or Black and Tans.
Gay, friendly, non-aggressive with no tendency towards nervousness or shyness. Bad temper, shyness, and meanness are not to be tolerated and are to be severely penalized as to effectively remove the specimen from competition.