Reply #7: you MUST make her understand that behavior is not tolerable

[Kali]

and while you are at it train the kid not to harass dogs. I saw a post recently where people were appalled that someone used the term "disciplined" with a dog. Bullshit. Your dog needs it immediately when she shows any sign of aggression to your kid. At the same time your kid needs to not be hurting the dog or doing anything that it might perceive as threatening - some forgiveness for self defense, but not much. Dog is at the bottom of the pecking order in a house with children and it must know and accept that.