I thought training a deaf puppy was going to be difficult, but you guys made it a walk in the park! This new collar is working really well with him and getting his attention. Also, the sit-stay technique is working great. I was extremely pleased with the natural training techniques used by Bark Busters! The training was very interesting and enjoyable - even for my puppy! I always recommend you guys, especially to the customers at work!! Thank you so much for your time! I really appreciate what you do, and my puppy thanks you as well. Together, we have a better understanding of each other.