A correctly bred Rottweiler should be a powerfully built, robust dog, not a sloppy, oversized mastiff; the Rottweiler should be a powerful athlete, not an awkward dog that is exhausted from a trip to the end of the driveway because he was mixed with mastiff or great dane for size or was produced from poorly bred representatives of the breed with no concern or thought to character, conformation, angulation, top and bottom lines, type, etc.