It's a training program that started in Australia. A trainer comes to your house and works with you and comes back as much and often as you need. We had a one year contract but are going to extend it for his lifetime. My friend had 3 dogs and she had a different trainer from there come out to her house and she said they worked wonders
They give you a lot of tips on how to fix the problem and show you how to do it, and then you need to practice.
The website is
Dog Training: Bark Busters Home Dog Training