I don't know if this will be any comfort to you, but it's probably a GOOD thing that Kodie won't fight if he is attacked. He'd have much more chance of getting hurt if he did fight I think. I think it's rare that a dog would continue attacking another dog that is yielding and not fighting back. If it ever did happen, one of the first things I'd do probably is drop the leash so his movements weren't restricted. As far as just the fear of it, I understand that is harder, especially if you have had experiences that triggered it. Perhaps others will have more advice for you.