When do Chesapeake Bay Retrievers stop growing?

Chesapeake Bay Retrievers stop growing between 12 to 18 months of age. They experience an initial growth spurt in their first six to 12 months, with the majority of their growth occurring during this period. They will continue to fill out and develop muscle tone until they are about 18 months old. Growth rates can vary, so some individual dogs might take a bit longer to reach their full size.