When you get frustrated, and you will, put your dog away and think about what just happened. Think about the mistakes you made, not the mistakes your dog made. When I started to get really serious about dog training I made the mistake of thinking it was always the dog. I thought I just needed to find that perfect dog to train. My wife (Cindy) is one of the best dog trainers I know. Over the years of watching her train her dogs, not just for dog sports, but to enjoy live with  I realized that every dog can reach some form of perfection. It just takes time and the love of being with your dog, thank you leerburg online university.