I live a few miles from where this happened. I see so many people walking pit bull mix breed dogs in the area. I’m betting that the majority of the people have no idea if their dog is dangerous or not. My aunt rescues dogs and cats. She rescued a deaf pit bull. She was sitting on the couch eating some fruit when the dog sat next to her. A young cat came walking over to her and the pit bull bit the cats head completely off. The dog lived with a bunch of cats for almost two years and never showed any aggression towards them. The dog just snapped that day.