Jim was clear in explaining the training techniques to us. While at first the growl seemed odd, now we see that it works. In the beginning of the session, our dog, Max, wanted to kill Jim. But by the end of the session, he was very friendly. We had tried other techniques we thought would work but they didn't. It was great seeing my dogs respond to commands. I would recommend Bark Busters because I saw firsthand that it works. At first we had dogs that wouldn't listen to anyone and now we have dogs that respect us and do what they are told. THANKS!