The LAD Terhune Collie is a breed of dog that originated in the United States. It is a medium-sized, long-haired breed that is known for its intelligence and loyalty. The breed was developed by Albert Payson Terhune in the early 1900s and is named after him. The LAD Terhune Collie is an excellent family pet and is often used as a working dog. They are also very active and require plenty of exercise.