Money. Therein lies the rub. One of the drawbacks to training competitively is the cost. Between class fees and trial entries, this can be an expensive sport. That doesn’t have to deter you, though. Many clubs offer significant discounts on training and entries if you work at their trials, which was a huge help for me. I earned quite a few free or nearly free classes by working trials. The fees for junior handlers (-18) are also considerably more affordable.
Most training schools are happy to allow you to attend and observe (leave Fido at home for this) a class or two to be sure the style of instruction fits with your beliefs. Dogs learn best through progressive reinforcement training; rewarding the dog for making the right choice and withholding rewards, or ignoring the dog for making an incorrect choice.
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.
Second, it’s easiest to ignore unwanted behavior and reward an incompatible behavior. When Rover bites at your hands, he wants attention. He wasn’t born programmed to know that you want him to sit and ask nicely for attention, so you have to teach him. Instead of scolding him, ask him to sit. When he complies, reward him with a food treat, lavish praise and petting on him, or offer a game of fetch or tug.
Agility first appeared in England in 1978, as essentially a half time show at Crufts. The creators based the demonstration on horse jumping competitions, intending to show off the dogs’ natural speed and agility. Dog owners and trainers looking for something new to do with their pets pricked up their ears and said, “Hey, MY dog could do that.” Thus the sport was born.
Unless you plan to keep your dog outdoors--and few of us do because it's not recommended--you'll need to teach your dog where to eliminate. Therefore, house training (also called housebreaking or potty training) is one of the first things you need to work on with your dog. Crate training can be a very helpful part of the training process. This includes house training as well as many other areas of training: