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Originally Posted by Hannibal

If you start out with a working quality rottweiler (which is different genetically than a pet quality rottweiler) and never actually work him in protection (not sch) whether it be in training only or actual daily duty, he will ultimately be different in the house than if you were to work him.

While I OFTEN differ with Hannibal's viewpoints...I think on a certain level this is true. I don't believe all the same genes necessarily are passed down to every pup in a litter. I do believe that a dog's potentials are in the genes. I believe that a high scoring sport dog can still be a great family pet, but I do believe that a high scoring sport dog has definitely received some different genes from it's parents compared to other litter mates. Training will improve everything, but it won't change genes.