If they learn how to avoid a zap, then they are learning what you want them to do. Itís working. That is why I rarely need to use it. I was having some serious behavior problems that I could not stop because I didn't understand a WL temperament or drive. My dog is also very playful, so he learned if something is good, to do it in as big a way as possible. He was leaping on my back from behind. He knew not to jump from the front, but quickly realized I could not stop him from behind as I didnít even know he was going to jump until he did. The collar stopped that behavior instantly. Recently, my senior dog has been jumping the fence and chasing things. Itís a completely new and unexpected behavior for a dog who should be slowing down. He has been with her every time and always returns when I call him. He hasnít even tried to jump the fence. The first time, I used one click on the collar, but after that, he knew when she went over the fence, it was his cue to run to me and into the house. I don't use an e collar on her and I wonít, so I have had to be creative, but she hasnít gone over in a while. Hasnít even tried, fortunately.