Switch up the treats, rewards and praise during training. If they view training as a game, rather than something they are scolded during, they will have more fun and you'll see quicker results. You may also find that your pet's response is better to different types of rewards through this process. When training, always rewards positive behavior with treats, a clicker, pets, and/or verbal praise and simply ignore bad behavior. They will learn if they want a reward they must do what you've asked of them.