I've never been in a scenario like this before, but I'm very curious on what the outcome would be.
OK, say that you were out walking your dog and at some point on that walk you were actually in danger. Such as a gang or whatever comes up to you to mug or bash or kidnap you and your dog steps up to the plate and uses violence to protect you. Would your dog have to be put down or confiscated or declared dangerous because your dog did the right thing and saved your life? What would be the legal outcome?
Another similar scenario. What if you were in bed asleep or just away somewhere and burglars broke into your house and they were silly enough to confront your barking dog, then the dog attacks them because they didn't get the message and were invading your/his territory. Is that wrong or right?