The Labrador Retriever was bred to be both a friendly companion and a useful worker. Historically, he made his living as a fisherman's helper, dragging nets, hauling ropes and hauling fish from the chilly North Atlantic Ocean. Today, the Labrador Retriever is as good-natured and hardworking as its ancestors, and it is America's most popular breed. Today, the Lab works as a service dog for the disabled, a show competitor and a search and rescue dog, among other functions.