If as a dog owner I don't fight off any other dog that is attacking my precious baby, I don't think I deserve to answer the owner of the dog. I should not be afraid to fight for my dog. 

If I have a gun, I would shoot the dog attacking mine dead immediately. I don't give any chance when it comes to protecting my dog from aggressors. 

If I have a gun on me at the time, I will definitely shot the dog attacking my own dead without any hesitation. The life and safety of my dog comes first over any other mad raving mutt.