The collie is an active, lithe, strong dog that combines strength, speed and grace. Its gait suggests effortless speed as well as the ability to change speed and direction instantly, as required in herding dogs. The coat can be of two types, both with a soft, abundant undercoat. The outer coat of the smooth variety is short, hard and flat; that of the rough variety is straight, harsh, abundant and long, particularly on the mane and ruff. The collie's expression is an important hallmark of the breed, and depends upon the shape and balance of the skull and muzzle, as well as the characteristics of the eyes and ears. It should be bright, alert and intelligent — traits accentuated by a fairly refined head.
The collie is gentle and devoted, a mild-mannered friend to all. It is a dog with a working heritage, and it needs daily mental and physical exercise or it can become frustrated. It is sensitive, intelligent and willing to please, although it is sometimes a bit stubborn. It can nip at heels in play. Some may bark a lot.
Temperament: Alert, Energetic, Tenacious, Responsive, Intelligent