Retrievers are the most popular type of dog in America, especially Labrador Retrievers which have been the top dog breed for over 20 years. Retrievers are friendly, tolerant of other animals, enjoy social interaction, are easy to train, and loyal to their families. They thrive on exercise like swimming, retrieving, and agility competitions. Several types of retrievers are described including Labrador Retrievers, Curly Coated Retrievers, Flat Coated Retrievers, Golden Retrievers, Nova Scotia Duck Tolling Retrievers, and Chesapeake Bay Retrievers.