Coming from personal experience, if my dog naturally did not show the bite I was looking for, I would be hesitant to even try to develop the bite without the knowledge and expertise of a helper or trainer who knew how to work the dog in front of them. When it's done wrong, you end up with a crappy, depressing bite that leaves you wondering why you're in the sport. If you have someone take their time, build the dog up properly, and create the best picture the dog can offer, you might still be sorely disappointed but at least your dog is having fun and you are too.