If your answer is a resounding “No!” then you may think you have an impossible dog. But think again! Most kinds of dogs that people have trouble training (typically Hounds, Terriers, and some Northern Breeds) actually have many characteristics that make them quite trainable - they are smart, are good problem solvers, and have strong drives to get what they want.
The key to training success with these dogs is to figure out what they find rewarding and then use those rewards to get the behavior you want. You’ll be amazed at what your “bad” dog will do when you know how he thinks and what turns him on!