There is an ever-growing list of agility sanctioning organizations. The ones you’ll hear about most often in the US are NADAC, AKC, and the USDAA (see below for a more complete list of national and international groups). Each organization has its own rules and style. For example, NADAC courses are spread out and focus on speed. They often challenge the handler to send their dog through the course at a distance. USDAA courses are “tighter” and more technically challenging.
AKC Canine Good Citizen (CGC) evaluators are another class of dog-training professionals. AKC CGC Evaluators may or may not be trainers or behaviorists, but are certified by the AKC to evaluate dogs in the Canine Good Citizen test. Training other behaviors and getting a dog used to being alone, for example, can help reduce separation anxiety. The root cause, however, would likely need to be determined by a behaviorist, who could then refer you to a trainer if he or she was not able to help with the training issues.
Prong collars must never be turned inside out (with the prongs facing away from the dog's skin), as this may cause injury against the body and head.  Plastic tips are occasionally placed on the ends of the prongs to protect against tufts forming in the fur or, in the case of low quality manufactured collars with rough chisel cut ends, puncturing the skin. Like the slip collar, the prong collar is placed high on the dog's neck, just behind the ears, at the most sensitive point.
The fur is flying, the noise is at a decibel I've never experienced before and the desire to win is so thick you can feel it. This is agility competition for dogs and Fiona, my soon to be athlete, and I are on the sidelines of an agility competition taking notes. Dogs of every breed, size and shape are jumping hurdles, running up A-frames, scampering across elevated walkways and diving through tunnels. So as not to get lost on the course, each dog is in constant eye contact with their owner who gives directions through hand signals and one-word prompts.
There are many factors that go into choosing the right training school for you and your dog. Certainly distance is a consideration; however, convenience shouldn’t be the only factor that influences your decision. Other things like training methods, appropriate classes for your needs, compatibility of the instructor’s personality with yours, and certifications of the instructor should also play a role.
Obedience training usually refers to the training of a dog and the term is most commonly used in that context. Obedience training ranges from very basic training, such as teaching the dog to reliably respond to basic commands such as "sit," "down," "come," and "stay," to high level competition within clubs such as the American Kennel Club, United Kennel Club and the Canadian Kennel Club, where additional commands, accuracy and performance are scored and judged.
Dog training shouldn’t wait until you’re having behavior problems. If you get a new puppy, start from the beginning with professional training to give both you and your puppy the tools you need for a healthy relationship. Dog training is as much about teaching the owner how to interact with their new dog as it is about the dog learning to behave. Puppy training can start as early as eight weeks old. Trainers who offer puppy training programs may works specifically with dogs between the ages of 8 and 18 weeks old. Trainers can teach owners about potty training and how to deal with accidents, working with separation anxiety, and training your pooch out of destructive behaviors like chewing, biting and demand barking. Puppies will start to learn to walk on-leash and other basic skills.
In recent years, a new form of Obedience competition, known as Rally Obedience, has become very popular. It was originally devised by Charles L. "Bud" Kramer from the obedience practice of "doodling" - doing a variety of interesting warmup and freestyle exercises. Rally Obedience is designed to be a "bridge", or intermediate step, between the CGC certification and traditional Obedience competition.
There is nothing inherently wrong with telling your dog “no,” except that it doesn’t give him enough information. Instead of telling your dog “no,” tell him what you want him to do. Dogs don’t generalize well, so if your dog jumps up on someone to say hello and you say no, he may jump higher or he may jump to the left side instead of the right. A better alternative would be to ask him to “sit.” Tell him what you want him to do in order to avoid confusion.