We have two dogs, a yellow lab and a boxer mix. We had originally worked with Bark Busters and a different trainer more than a year ago and purchased the life time of the dog service package. Our boxer mix unfortunately was attacked while on leash with us more than three times while walking around our neighborhood since that training and thus began having leash reactivity and aggression towards other dogs. I made the call to Derek and he came out the very next day. He spent two hours helping us refine our former training with her and helping us with new training that involved desensitization to help her have more confidence. After two weeks of going back over the basics with her and implementing some new training that he showed us, she is much calmer and walking with us instead of flailing about and getting anxious and aggressive when she hears or sees another dog. I have no doubt that in a few more short weeks we will be able to walk completely calmly once again and everyone can enjoy the fresh air. Thank you Derek!