Congratulations to this man for surviving a harrowing ordeal.
I'm one of these guys who always has a plan for any kind of possible disater/life threatening situation, etc.
I'm VERY protective of my dog and will be taking home a new puppy soon. When I'm with my dog at the "bark park" I NEVER sit and chat with the other owners, I'm always on the periphery of where my dog is playing, not interfering, just ready to protect him. I can tell when another dog is on the verge of being aggressive and will move in and get my dog to start playing with other dogs who are well behaved.
The couple of times a dog went after my dog I was there in a microsecond and aggressively backed the dog off, I didn't scream, I said "hey" in a firm tone of voice and made an aggressive move towards the dog showing dominance and the dog's backed off, luckily-I was ready to fight and kill though.
I know in a life threatening situation, I will be able to kill any dog unless they sneak attack me and sever an artery in my neck. My first move will be to throw one devastating punch to whatever area is exposed, I might not recommend this method to a woman or weak man. I know how to throw a punch and deliver a blow, I'm a big lifelong athlete and can hit a golf ball 350 yards. If a dog has locked on to my dogs neck I will try to punch and break it's neck if possible, followed by tackling(getting my arms around) the dog by the body and trying to land with my full body weight on the dog, if done right it will break ribs/knock the wind out of the dog and damage it internally. If the dog is still fighting I will grab at any leg and try to snap it. All of the above actions should take no more than a few seconds in total.
You have a couple of beautiful dogs. I understand why you would watch them like a hawk.