Border Collies were first bred as herding dogs originally in the border area of England and Scotland. Many folks agree that they are very smart, if not one of the most intelligent dog breeds.
Border Collies are highly trainable and full of energy. Although they have become popular as pets and sport dogs, they are still used on farms throughout the world for herding livestock animals. They may not always be overly friendly to strangers, but will become affectionate and protective once they get to know you.