NEVER punish your dog for growling!
A growling dog isn't an aggressive dog! When a dog growls, he is choosing to use a nonviolent method of telling a person, child, or other dog to "please back off." A truly aggressive, antisocial dog wouldn't be giving any warnings. If an owner punishes and prevents their dog from growling, the fear or anxiety that caused it in the first place will only grow, and the dog will likely choose another method to keep the scary thing away. This is a recipe for a biting dog! Click here for the article.