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.
In the twentieth century, formalized dog training originated in military and police applications, and the methods used largely reflected the military approach to training humans. In the middle and late part of the century, however, more research into operant conditioning and positive reinforcement occurred as wild animal shows became more popular. Aquatic mammal trainers used clickers (a small box that makes a loud click when pushed on) to "mark" desired behavior, giving food as a reward. The change in training methods spread gradually into the world of dog training. Today many dog trainers rely heavily on positive reinforcement to teach new behaviors.
Changing behavior takes time. You need to have realistic expectations about changing your dog’s behavior as well as how long it will take to change behaviors that you don’t like. Often behaviors which are “normal” doggie behaviors will take the most time such as barking, digging and jumping. You also need to consider how long your dog has rehearsed the behavior. For example, if you didn’t mind that your dog jumped up on people to say hi for the last seven years and now you decide that you don’t want him to do that anymore, that behavior will take a much longer time to undo than if you had addressed it when he was a pup. Remember it’s never too late to change the behavior some will just take longer than others.
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.
"Pamela's approach to dog training is one of the only few in Dallas that does not use treats to train. With this approach, your dog not only listens to you better, but longterm wise they won't keep looking at your hand or for the nearest bag of dog treats nearby to determine if they should listen to you. This has taught my dog to fully understand my commands better and build a better relationship and bonding experience between her and me based on praise training. My dog now listens to me without having to have any treats on hand or nearby."