The Chesapeake Bay Retriever is one of the few breeds that was created and developed in the United States. Through a series of events surrounding a shipwreck in the early 19th Century, the Chesapeake Bay Retriever was created from Irish water spaniels, hounds and Newfoundlands. 

These dogs became known as the "bay dogs" to retrieve birds from the icy and rough waters of the Chesapeake Bay area off the coast of Maryland. They would often retrieve between 100 and 200 birds per day, so they were required a descent amount of stamina and endurance.

Today, the Chesapeake Bay Retriever is a loved family dog with the versatility to perform more than just retrieving in harsh conditions. They are part of the sporting group and make fabulous obedience, agility, therapy, hunting and field work, and tracking dogs, and fulfill each roll with pleasure. 

They are positively full of energy and prepared to please. These retrievers require a great deal of energy management as they are so eager to be tasked with a day long job, and are therefore not the best fit for a family who is looking for a low energy couch potato like dog. 

I would highly recommend consulting a breed professional who can explain more about this specific breed and help you determine whether or not it would be a fit for you. Though I can tell you with certainty that if you own a Chesapeake Bay Retriever, they'll keep you busy finding them a job and they'll always be ready to work for you.