When a dog of mine exhibits any dog or human aggression, with a quickness, I deal out sudden and extreme discipline in the pack style/mentality...
They get few chances to fully correct or they are culled from the gene pool.
I also agree that sporting breeds of good stock are only a good choice if they have a job and the excercise...
There are lots of watered down "sporting breed" dogs out there with AKC in their pedigree. These can behave more docile and less motivated etc. but they also have the "cheapened" genetics that are not the healthy specimen of the original dog bred for performance.