They were bred to be attack dogs! I have seen pits that were gentle and loving. They are like a landmine. They can explode with no warning or logic. Once in attack mode the fact it is their owner means nothing. The owner just became prey. They were bred to kill. I like dogs and have three. I would never have a pit nor rottweiler.
Shepherds are great. They can be vicious if trained to be vicious but are not by nature. Shepherds are instinctual protective of their owners.
I once had a Shepherd that differentiated between the necessary protection for me or my wife. If a stranger came up she would position between my wife and the stranger. Once my wife said okay, she would run up to the stranger to be petted. If it was me she would just lay there and look at the stranger. It was like, "You can handle it but if you need help I am here." Once I greeted the stranger with a handshake she would immediately jump up and run to the stranger for petting. I loved that dog now sadly passed.
She became friends with the Fed Ex driver and would jump up in the cab to be petted. One day I discovered a horrified Fed Ex driver in his cab with my dog. It was a different driver and did not know the routine. My dog was whining and confused. I told him to pet the dog and you will be her new friend.
Having the dogs understand necessary protection is a necessary thing.
It was like a fairytale romance. He and she met at a dog park. They both had the same type of dog and the dogs really enjoyed playing with each other. Soon he and she were in love with one another and one night found themselves together in the other’s apartment. One thing led to another and in the middle of some loud he’in and she’in, the dogs took the commotion as one was attacking the other and needed to be saved. It ended up with the dogs fighting each other and both people.
Injuries were sufficient that we transported one patient who spilled the story.