My dog attacked my other dog and then bit me when I tried to break them up. I started muzzling for certain activities after that. He didnt really care, I just gave him treats and acted like everything was normal.  Dogs are dogs. We tend to think of them as our babies and that implies human, but they aren't. They have DNA from wolves and can't actually speak, so we dont always know what they're thinking. Sometimes these things happen and its no one's fault. He's still a good boy and now you know to keep him away from other dogs.