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Boston Terrier



General Appearance

The Boston Terrier is a lively, highly intelligent, smooth coated, short-headed, compactly built, short-tailed, well balanced dog, brindle, seal or black in colour and evenly marked with white. The head is in proportion to the size of the dog and the expression indicates a high degree of intelligence. The body is rather short and well knit, the limbs strong and neatly turned, the tail is short and no feature is so prominent that the dog appears badly proportioned. The dog conveys an impression of determination, strength and activity, with style of a high order; carriage easy and graceful. A proportionate combination of « Colour and White Markings » is a particularly distinctive feature of a representative specimen. « Balance, Expression, Colour and White Markings » should be given particular consideration in determining the relative value of general appearance to other points. The clean-cut short backed body of the Boston Terrier coupled with the unique characteristics of his square head and jaw, and his striking markings have resulted in a most dapper and charming American original The Boston Terrier. In a comparison of specimens of each sex, the only evident difference is a slight refinement in the bitch’s conformation.


Weight is divided by classes as follows

  • under 15 pounds (6,8 kg),
  • 15 pounds and under 20 pounds (6,8 to 9 kg),
  • 20 pounds and not to exceed 25 pounds (9 to 11,35 kg).


Short, smooth, bright and fine in texture.

Brindle, seal or black with white markings. Brindle is preferred only if all other qualities are equal. (Note Seal defined Seal appears black except it has a red cast when viewed in the sun or bright light). Required markings White muzzle band, white blaze between the eyes, white forechest. Desired markings White muzzle band, even white blaze between the eyes and over the head, white collar, white forechest, white on part or whole of forelegs and hind legs below the hocks. (Note a representative specimen should not be penalized for not possessing Desired Markings.) A dog with a preponderance of white on the head or body must possess sufficient merit otherwise to counteract its deficiencies.

Behaviour & Temperment

The Boston Terrier is a friendly and lively dog. The breed has an excellent disposition and a high degree of intelligence, which makes the Boston Terrier an incomparable companion.

Important Proportions

The length of leg must balance with the length of body to give the Boston Terrier its striking square appearance. The Boston Terrier is a sturdy dog and must not appear to be either spindly or coarse. The bone and muscle must be in proportion as well as an enhancement to the dog’s weight and structure.

Breed Movement

The gait of the Boston Terrier is that of a sure footed, straight gaited dog, forelegs and hind legs moving straight ahead in line with perfect rhythm, each step indicating grace and power.