A working dog in every sense: the appearance is completely secondary to the dog’s functionality at its job: herding sheep.

The Border Collie dog has a resistant and athletic anatomy, with an outline that reveals a graceful, balanced and quality dog. The skull is quite wide, with full cheeks; the muzzle ends in a tip, relatively short; defined stop; oval shaped eyes, well separated; erect ears or semi erect. The neck is slightly arched and with good length, strong and muscular. The body is slightly longer than high; the hindquarters are wide, sloping toward the tail’s insertion; long and deep thighs, well angled and low hocks. The tail is moderate length with the last vertebrae, at the hock, which rises when excited (but never over the back). The Border Collie stands at about 53 cm, a smaller size is desirable for the female.
BORDER COLLIE Dogs owners               
An action dog with plenty of energy and intelligent, the Border Collie dog is a workaholic shepherd, born to please and moving sheep. If the owner is not a shepherd and has no sheep, it should look for other tasks to keep the Border happy. This dg stands out in obedience and agility, and of course, in shepherding tests. It learns quickly and is obedient by nature, bred to follow the shepherd’s indications. The Border Collie can be the most intelligent of dogs, perhaps except for the poodle.
With all that work the Border Collie is not a dull dog: the best trainers consider the Border Collie as the most intelligent breed.
The Border Collie dog comes to the world with 500 g, which is quite big for a breed that weighs around 15 to 22 kg when adult. It is a natural breed, and has few growth or development problems. Exercise and obedience training can begin at early age. Many specimens intended for farms and herding tests begin their training after four months. Although physical maturity is usually reached after a year, or a little later, it will take at least a year or two until the dog works perfectly.
Border Collie puppies are active in body and soul, and need constant attention and patience from their owners.
Responsible breeding and control have made the Border Collie a practically genetic problem free breed. The ears can be erect or semi erect and the coat can be straight or semi long.
The Border Collie is considered a very robust and healthy animal, practically exempt of hereditary and congenital problems, adaptable to the environment, for which it is very resistant to disease. There can be hip dysplasia cases as well as progressive retinal atrophy, although it is very rare, as well as the Collie eye anomaly and epilepsy, due to selective breeding. More frequent, especially in males, is the osteochondritis dissecans, a cartilage anomaly that arises during the period with most growth between four and eight months. An adequate diet (prescribed by the breeder), without excess supplements, is vital during this time.

There have also been cases of inappropriate bite, allergies, primary ciliary diquinesia (a respiratory problem), deafness and cryptorchid specimens, although not frequently. The Border Collie requires a lot of brushing, exercise and mental stimulation. It usually lives between 10 and 14 years, although some have reached 18.