2021 Rottweiler Puppy Calendar! The brave Rottweiler is strong and true with a loving heart! The breed originated in Germany, where it was used to drive cattle and pull carts for farmers and butchers. That heritage is reflected in the Rottie’s broad chest and muscular body (in adulthood). This Rottie’s wall calendar is the perfect gift for all dog lovers. Our Rottweiler Puppies 2021 wall calendar will make people of all ages smile.