As is the case with many breeds of dogs that are still used for their original purposes, breed standards vary depending on whether the registry is more interested in a dog that performs its job superbly or a dog whose appearance meets an ideal standard.
There are two types of tests, or standards, to determine the breeding quality of a Border Collie. The original test was the ISDS sheepdog trial, still used today, where a dog and handler collect groups of livestock and move them quietly around a course. There are certain standard elements to this test. Sheep must be gathered without being too much disturbed, from a distance farther than the typical small airport runway. They then must be directed through obstacles at varying distance from the handler, and then the dog must demonstrate the ability to do work close at hand by penning the sheep and sorting them out. It is these elements which have shaped the working abilities of the Border Collie and defined the breed. These dogs are necessarily capable of incredible feats of athleticism, endurance, intense focus, and high levels of trainability.
In nearly every region of the world, the Border Collie is now also a breed which is shown in ring or bench shows. For the people who participate in these events, the Border Collie is defined by the breed standard, which is a description of how the dog should look. In New Zealand and Australia, where the breed has been shown throughout most of the twentieth century, the Border Collie standards have produced a dog with the longer double coat (smooth coats are allowed), a soft dark eye, a body slightly longer than tall, a well-defined stop, as well as a gentle and friendly temperament. This style of Border Collie has become popular in winning show kennels around the world, as well as among prestigious judges.
However, other enthusiasts oppose the use of Border Collies as show dogs, for fear that breeding for appearance will lead to a decline in the breed's working dog traits. Few handlers of working Border Collies participate in conformation shows, as working dogs are bred to a performance standard rather than appearance standard. Likewise, conformation-bred dogs are seldom seen on the sheepdog trial field, except in Kennel Club-sponsored events. Dogs registered with either working or conformation based registries are seen in other performance events such as agility, obedience, tracking or flyball, however these dogs do not necessarily conform to the breed standard of appearance as closely as the dogs shown in the breed rings as this is not a requirement in performance events, nor do they necessarily participate in herding activities.
Its breed standards state that in a show its tail must be slightly curved and must stop at the hock. The fur must be lush. It should show good expression in its eyes, and must be intelligent. It is energetic with most commonly a black and white coat. It should have a very strong herding instinct.
