Is the picture in the article a good example of the "armor"? It doesn't seem to cover all that much. Certainly not enough to call the dog bullet proof. I hope that for $30,000, the armor is a little better than just that vest.
The face/head area for the dog is just impractical. And aside from a helmet, it's probably covered about as well as a soldier is, around the core vital torso area.
As for the rest, the trained dog is not going to be turning it's unarmored end towards the enemy intentionally ever. They're pretty... single minded.
Those dogs are trained to refuse any food not provided by someone thats is one of their caretakers.
Also, most will not take treats from your hands.
Running from any dog will insite the chase/kill instinct. With an non shutzhund trained dog, its best to hold your ground and not make eye contact. With a trained attack dog, if its been commanded to eat you, its gonna eat you and you are just *expletive deleted* out of luck.
The only thing that will stop a well trained dog is the command FROM THE HANDLER.
if its not well trained, well... So long, nice knowing you (and this is why anatolians are not used as attack dogs. They won't call off )
Your only chance with a charging trained dog is to try and get in a bit of matador/judo, and sidestep/flip it as it makes it's lunge. And the odds are 99.99% you'll fail anyway, but that's your one chance.
Of course, if you don't stun the dog on the ground hard enough to incapacitate it, or you actually wind up in control of it's neck with none of you in it's mouth, now you've got it's handlers and maybe another dog coming right along any second now.
The dog is faster than you, and does not have human psychology in terms of dedication to the attack when faced with pain, weapons, or resistance either. In reality, there's only two real solutions to a trained K9 after you.
1. Be somewhere else.
2. Kill it ASAP with superior firepower.
And #2 is dicey, because in most instances, the human members of your OPFOR will often react viscerally with more aggression to a dead K9 than they would to one of their own being wounded.