With dogs, it's nurture. Not nature. For dogs to be that violent, it's clear they weren't taken care of properly. Most likely trained to fight. Probably chained up in the back yard with no attention and hopefully food and water. Dogs just want to love their humans. If you let them love you and love them, they will be loving members of society. If you treat them like shit and or train them to fight, this is the outcome. I feel bad for that man. Just walking outside and was attacked unprovoked by two viscous dogs. I'm glad he lived and I hope he's living a normal life now. I also kind of feel bad for the dogs. for dogs to act like that it's clear they were abused. It's unfortunate, but you can't teach a grown dog much of anything. Those dogs will always be dangerous now, and hopefully have been put down.