I don't have much advice regarding fighting, except throwing a large glass of ice water on them breaks up fights. I learned this after having m,y finger lacerated.
Other than that we correct the slightest hint of disagreement between the dogs before it escalates. We had a few fights before we learned the signs in our dogs.
Riley - 11/05/2012-8/30/2013 (Myasthenia Gravis)
He will always be in my heart.