Dogs are a lovely species of animal, but for as lovely as they can be, they can also be just as wild and out of control at times. There are often a lot of things that go into why the dog progresses to that point, but most often, it is a problem of learned behavior from owners or of bad behavior being allowed to become worse through inaction. At that point, it may become all too much work to reign in your pup, and you may be advised to consider taking your dog to a dog obedience school. There are a lot of questions you may have however, such as effectiveness, treatment, cost, distance, etc. that will all be answered shortly.