The Border Collie is a well-balanced, medium-sized dog of athletic appearance. The body is slightly longer than the height at the withers. It is very agile, and has a well proportioned body of lean muscle. This dog breed is highly intelligent and hard-working that responds quickly and eagerly to training.
The Border Collie is the world's premiere unsurpassed as a sheepdog in terms of agility, stamina and patience. It excels in obedience competitions. It thrives on games and is willing to please. The Border Collies are bred for working ability and intelligence rather than for physical beauty.
It appears in many colors, with various combinations of patterns and markings. The most common color is black with or without the traditional white blaze, collar, stockings and tail tip, with or without tan points. A variety of primary body colors is permissible; solid color, bi-color, tri-color, merle and sable dogs are judged equally with dogs having traditional markings. White should never predominate.
Two varieties are permissible, both having soft, dense, weather resistant double coat.
It is generally a hardy breed, but some are prone to hip dysplasia, PRA and an eye disease (common to Collies known as Collie Eye Anomaly). Many dogs are allergic to fleas and some are prone to epilepsy and deafness. To minimize the risk of your Border Collie developing any hereditary health issues, you should buy a Border Collie puppy from a reputable breeder.