I learned how to kick a dogs ass back when I was a kid. They really are easy and do not require deadly force unless there are 2 or more of them, but a single dog is deadmeat against any human who knows their fighting style and weaknesses.
It is very easy to knock the wind out of a dog. Kick them in the ribs surrounding the chest when they lunge.
If they come at you, you do not try and dodge out, you go right into the attack and try and grab their tonsils. THey hate that one and are not equipped mentally for something that goes into their mouth willingly. It likely will net a trip to the first aid kit, but that dog will think twice about round 2.
If it is male dog...yep, we all know his vulnerability...same as you fellas have. :shocked2:
Think about eating the dog when you are trying to hit or kick it. Dogs are predators and recognize "I want to eat you body language." If it starts to think you have no fear of it and are actually hunting it, the dog will head for the hills.
You really only need to resort to deadly force with multiple dogs. Even large dogs are cowards at heart and will not stand and fight a human who is not reacting 'normal'. Normal is fear and attempts at escape and damage minamalization. Act like a predator, not prey.
If there is more than one dog, then shoot and do not hesitate. In numbers the dog is mighty, where as alone they are highly vulnerable.