Chesapeake Bay Retriever (aka Chessie) is one of the few breeds that originally were born in the USA. Chesapeake has been thought to descend from two Newfoundlands, called Sailor and Canton, who came to the USA on a ship from England in 1807. Chessie is an intelligent breed with a strong work ethic. This breed has an alert nature, which makes them excellent watchdogs. Chessie is a very stubborn breed and requires steady and firm training by every adult member of the family. Don’t let your Chessie do whatever he wants, even just one time, or you will have to train him for weeks. Chesapeake has goofy humor, but the entertainment sometimes can come together with his obsessive stubbornness. They are very protective of children, but they can act improperly with friends. The size of the Chesapeake is about 21 to 26 inches, and it weighs about 55 to 80 pounds.