treats

Fighting fear aggression: To get over this problem, your Dog pup needs to be trained in a puppy kindergarten class where he will be given obedience training. Here, he should learn his lessons with the use of positive reinforcement training methods.  By this we mean that the pup be praised, given  and positive attention for good behavior. He should also be socialized or exposed to various social situations in a positive light.

http://dogtrainingmastery.com/Dog_Training/dog-behavior-training.htm
http://lowflyingduck.com/Free_Dog_Training/clicker-dog-training.htm