If there is one thing I learned from Dungeons and Dragons it is that dragons are strong, but they are not worst thing out there by quite a bit. Dragons grow to monstrous sizes, hold many natural weapons, and are quite powerful mages. However the natural armor of a dragon is weak under the belly and if the wings are even nicked the chances are one of many aunties in the wings will be punctured causing a bleed out rather quickly.
See pic for something MUCH worse than a dragon