We are very pleased with the results that we have obtained using Donald Cohen and Bark Busters. Our dog (flat coated retriever mix) is very smart and picked up the training very quickly. He walks much better on a leash and is much more at ease with our family. Donald was very clear with his explanation of the fundamental concepts and techniques both with both my husband and me, and our three children. The natural training techniques make a lot of sense and are very humane and effective. Donald has been very supportive of our efforts and has a calm, pleasant training style. He listens very well and provides very specific training instructions for the areas we needed to work at with our dog. I would recommend Bark Busters to my friends and neighbors because of their natural, non-treat based methods and results.