Shepherd is a label for a type of dog rather than a single breed. On adoption listings it most often means a German Shepherd or a German Shepherd mix, but it can also describe Australian, Belgian, Dutch or English Shepherds and crosses with Labs, Huskies and many other dogs. What links them is ancestry in herding and flock-guarding work.
Most are medium to large, usually 45 to 90 pounds, athletic and smart, with a thick shedding coat and a strong wish to stay close to their people. Many are loyal and quick to learn, while some are reserved or protective with strangers. They generally need daily exercise, training and a job to focus on. Because ancestry varies, a dog's age, size and behavior tell you more than the label.