You know, that leads me to a question: If I had had to shoot the dog, what then, assuming the neighbor attacked? His weapon, the dog, would be gone. It'd be like drawing on someone with a knife, who subsequently throws the knife away and continues to attack.
Justifiable shooting even though unarmed? That's dealing in too gray an area for me.
Josh <><
I agree with Caleb. You would have reason to fear for your life - or at least "great bodily harm" from a "mad" man.