That is bad.
I've been around two in my lifetime. One my cousin gave us when I was in my early 20's. My aunt lived with Mamma and Daddy. She was handicapped with a speech problem and walked with a real unsteady gait. She loved walking the dirt roads picking up cans. That dog would go with her and we never worried. One time the preacher went to hug her, and the dog took him by the pants leg and pulled him back. That dog would also follow Daddy all day long in his rounds on the farm. But he wasn't a pet. He was almost 3 years old before anyone laid a hand on him.
The other one was a stray who came to live with us when we were still in town. She scared folks, but never bit anyone. She was a pet.