The three tones of voice we need to utilize include the command tone, praise tone and corrective tone. As previously stated, the overall effect of teaching your dog basic obedience commands, in terms of establishing the proper role of leadership with the dog and increasing the dogs level of self confidence, really does wonders in terms of getting at the motivation behind the problem. Additionally, it enables you to control and communicate with the dog in all types of situations. The proper approach to obedience training is also the perfect avenue for the dog to get the attention and affection that all dogs crave. Please remember dogs are unlike any other animal on earth.
Praise is what teaches a dog what to do.
Corrections teach the dog what not to do. In other words, the type of things the dog wants to avoid. There is generally no need for physical punishment or discipline with a young pup. A correction only need be firm enough that the dog wants to avoid it or that it distracts the dog from the behavior. In my career, often times I am called as a last resort.