We were very skeptical of training our two dogs, we tried just about everything. Cory is 10½ years old and Sandy is 8 years old (both were rescued from shelters). They were very difficult to deal with when anyone rang the doorbell or walked by the house. We can't believe the changes that we saw in just a few hours after the 1st lesson. Karen and Alan explained the training techniques that were easy to repeat and practice. We would recommend Bark Busters to others; it really does make sense once you give it a chance. We are convinced that you can teach old dogs new behaviors. Thank you, we're happy with the results so far and the dogs are much happier too.