Shalom,
Just to be balanced I will add that my experience with a Rottweiler was a good one. Many years ago {In the late 80s} a friend of mine raised a Rottweiler from a puppy. I knew this dog since it was a little critter and it grew up quickly. Those dogs eat a lot and grow a lot and become big dogs. If the dog knows you it is very friendly and likes to play and lick you in the face. But if it gets riled up, is afraid, or thinks you are an invader, it can chomp on your bones like a toothpick. My friends dog used to chew on cement blocks. They have mighty jaws which I am glad I have never had to worry about. This dog used to love me and sit next to me when I visited.
muman613