Dennis is seriously a life saver. I knew that I desperately needed to do something since my dog was overly aggressive to people and other dogs, but I was worried about her being too old and stuck in her ways to change. Dennis proved me wrong in the first 10 minutes of meeting him. I had never seen my dog be so attentive before. After just 3 sessions, my dog has made insane amounts of progress. Typically, my dog cannot be around other people or dogs as she acts very aggressive. Her bark is so loud and alarming that people typically RUN the other direction when they hear her. We were having to plan walks around when we wouldn't run into anyone. I just got back from a walk with her now and my mind is blown. The leash was slack the entire time, she sat whenever I stopped walking, and she even politely greeted another dog/dog owner on the way! I cannot thank Dennis enough for all of his expertise and efforts. I went from hopeless to hopeful in such a short amount of time. I can't wait to see what else he can teach my dog in the future!