An attack dog is like a gun, if you keep it under lock and key you can never get to it in time if you need it.If the neighbor had a gun on the coffee table and the visitor picked it up and started fondeling it and it went off and wounded her would it be the guns fault?
Unless the woman was breaking and entering, the dog never should have been left out to attack her. If you want the dog to have it's own territory, put it in a cage. If you let someone in your house with your attack dog, or loaded weapons laying around, your responsible for your guest's safety. It not the gun or dog that kills people, it's the person in control of the gun or dog. If you don't have control of your attack dog, you will eventually lose control of your assets.