How do I know what level of stimulation to train with?

The training DVD that I did (Remote Collar Training for the Pet Owner) teaches people how and when to change the levels of stimulation.

With that said almost all training is done at a level that is very, very low. We look for a level that only causes the dog's eyes to blink when the stimulation is applied. If a dog verbalizes (yelps) the collar setting is way too high.

Levels of stimulation will also vary according to the distractions a dog is faced with and the level of drive the dog is working in. Many times during training a dog must be worked at a higher level of stimulation when it is faced with higher levels of distraction. Learning how to do this is one of the goals of the dog trainer. It's covered in detail in my DVD.