Actually the dog as it stand today will get away with more than the owner would if he beat the a-hole.
I am surprised as that breed are lazy and not met a aggressive one yet.
There was a case in USA where a a-hole broke into a home and a German Shepard's came and greeted him, it never bothered him and he went around the home grabbing all valuables and piling them up just inside the main entrance.
But, when it was time to go and he tried to leave the dog got a hold of him, he managed to use the landline to call the cops who came and found him minus his fingers on 1 hand.
Moral of story, do not break into a home with a dog that has the 2nd highest bite force, 2nd only to a Rotty.
I was going to be 1st to comment in this thread but thought it will soon have some PC fool saying the dog bla bla and the burglar should sue.