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Originally Posted by Hannibal

There are pet quality rotts out there that have no drive whatsoever, not even to bite a sleeve....

This I would agree with, and these dogs can still be great pets. I think (surprise) though that we agree on the genetics contributions. I guess part of my point here is that I believe most dogs (correctly evaluated as puppies as potential working rotts) can still be great pets in the house with good training...However, I feel that pups that were properly evaluated as not having proper working drives can still be great pets, but won't really cut it as working dogs. It's a gene thang.