You have dominant dogs. Give me a BREAK.
What happened to your thread with your puppy urinating submissively? That is NOT A DOMINANT DOG. (NO pup that I've ever seen submissively urinate has ever been a dominant dog)
If you think that's dominance, you haven't SEEN dominance, and if you get a smart, alpha-breed like a Scnauzer or a Bouv, you're gonna have BIG problems.
You should read up, talk to trainers, talk to breeders, and RESEARCH for a few MONTHS, not weeks, on dogs in general, because, not to be rude, you don't know much about them. And to have a guard dog, you need to know a lot about them.
I'm sorry to be mean, but you seem to have an unnatural obsession with guard dogs and dogs that bite, and if I were a breeder I wouldn't feel comfortable selling you one of my pups or grown dogs.