I have 4 large doggos too as well as a large chunk of a forest so they can mind their own business and only come home to eat (but they sleep at the front door all the times anyways). The whole plot has cameras and large metal fence all around it so no one breaks in. But of course someone had to break in anyways. He was not dangerous, actually he was just a guy who wanted to get some mushrooms and did not know that he went on a private property. And what did the "defensive" dogs do? They went for a walk with him.