Most dogs will be territorial about their house, car, or 'yard', whatever the breed. The fact that they are a 'big' breed, like Akita, Ridgeback, GSD just make them more intimidating.........now think of all the wee snipey, nasty collies, JRTs, spaniels and whatever......guarding whatever they regard as 'theirs'..........every bit as determined and full of balls........ are they bred to do that?......no, they just do it cos they are dogs and they are guarding what is 'theirs'!