A comment inspired this one.
Yes, a Pit Bull can be used for protection purposes. Is it the best dog for the job? NO. Also, just cause your Pit hits the end of his leash when someone strange comes around, or barks at every damn thing in site, doesn’t make it a “guard” dog. Did you know 85% of dogs WILL not attack someone if your being harmed? They have to be trained to that stuff.
Oki so lets summarize this.
A Rott was bred, for many years, to be a GREAT guard dog. So in turn it makes him easy to train, and it almost come natural to him to “guard”
A Pit Bull was bred for sporting events, like fighting, competitive events, and hunting. So that all comes natural to them. A VERY BIG misconception is “you have to train a dog to fight.” This is very un-untrue. 95% of time, it comes natural to them.