The Shetland Sheepdog, often known as the Sheltie, is a breed of herding dog that originated in the Shetland Islands of Scotland. The original name was Shetland Collie, but this caused controversy among the Rough Collie breeders of the time, so the breed's name was formally changed. This hard-working small dog is intelligent, vocal, excitable and willing to please. They are incredibly loyal to their owners to the point where they are often referred to as 'shadows' due to their attachment to family. This breed was formally recognized by The Kennel Club (UK) in 1909. Shelties have a high level of intelligence. According to Dr Stanley Coren, an expert on animal intelligence, the Shetland sheepdog is one of the brightest dogs, ranking 6th out of 138 breeds tested. His research found that an average Sheltie could understand a new command in fewer than five repetitions and would obey a command the first time it was given 95% of the time or better.