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The border collie is breed of dog that originated along the English-Scottish border. One of the most intelligent dog breeds, they have been used herding livestock for over 300 years. It is also famous for a pet or show-dog. The border collie is about 20 inches (51 cm) in height and weighs 31 to 50 pounds (14 to 23 kg). It is usually a long-haired dog. Its coat is often black and white in color.
- "Border collie". Encyclopædia Britannica Online. http://www.britannica.com/EBchecked/topic/73944/border-collie. Retrieved 2010-08-21.