Unless you are one of those people that can honestly commit 6-8 hours a day training your dog, one can always have something to learn from an organized obedience or conformation class. No matter how many dogs I have trained in the past, my dogs always benefit from the socializing of a classroom situation, as well as I, as the trainer, am offered an objective eye to what part of my pet's behavior training need to be worked on most. It's always best to choose classes that are small, allowing you to get the maximum personal attention necessary. This is especially important for extremely dominant dogs, submissive dogs, or novice trainers. I find it much easier to concentrate on training when both you and your dog are in a pleasant and comfortable environment.
Treats can be and are used effectively for any type of training.
After all, if there is one thing a dog will respond to favorably and consistently, it's food. Most professional trainers use rewards or treats as a part of their obedience and conformation programs, but they do not rely on them as the only tool. Treats must be used responsibly and only as part of a complete training program that is based on fundamental training principles. It is important to remember that dogs are best fed on a well balanced and nutritious diet, and the supplementation of too many treats can upset your dog's nutritional requirements. This is especially true in young developing puppies.