The term "shepherd's dog" can be described using different synonyms depending on the breed, characteristics, and purpose of the dog. For instance, the Border Collie is often referred to as a "herding dog" due to its exceptional herding instincts and high energy levels. On the other hand, the Australian Cattle Dog, also known as the Blue Heeler, is commonly called a "cattle dog" for its ability in managing and controlling cattle. The German Shepherd, renowned for its loyalty and intelligence, can be called a "guard dog" or a "police dog." Other dog breeds such as the Shetland Sheepdog, Welsh Corgi, and the Old English Sheepdog can also be labeled as "shepherd's dogs" due to their herding abilities.