The best protection dog I ever had was a Rottweiler Catahoula Hound cross. He was bred to hunt wild hogs and bear but made an outstanding 110 pound wicked vicious protection dog. The good thing about him was that he would obey me. He never bit anybody. He always positioned himself between me and other people. If they took a step toward me he raised his hackles, growled, and showed them his pearly whites. He was staying inside with my daughter one night while she was home alone. A man came to the gate and when he asked if that dog would bite if he came through the gate she said yes. He tried to come through the gate anyway. The dog tore through the screen door in a flash and the man barely got the gate closed before he was on it. I came home and the screen door was hanging by one hinge.
Now I have Mountain Feists that are great snake killers but just try to bark people to death.
Had a Heinz 57 like that once. Guy came up the driveway towards our youngest and Scooter did the same as yours. Got in between and growled. Not long after, someone poisoned him. One place we lived, before his demise, a sheriff deputy came into the cluster of houses we lived in to serve a warrant on someone. The dog was out roaming the yard and approached the ‘stranger’. Deputy stomped his foot at the dog. Dog moved in a little closer. I had to call him in the house. Fearless damn dog.