Shepherd dogs are a group of breeds specifically trained to assist in herding and managing livestock, particularly sheep. These dogs are known for their intelligence, agility, and strong work ethic. Common breeds include the German Shepherd, Border Collie, and Australian Shepherd, each excelling in different herding tasks. These dogs are not only skilled workers but also make loyal companions. They require regular exercise and mental stimulation to stay healthy and happy. Shepherd dogs are often used in various roles, including search and rescue, police work, and as service animals, showcasing their versatility beyond herding.