Dog breed descrimination - showing up late un-announced

In addition there can be significant temperament/personality differences between family lines within any breed, traits which are genetically controlled.

I even see this in our sheep; I can often tell grandmother and/or great grandmother of a sheep based upon its temperament/personality. We don't condemn our breed of sheep based upon the crazy/undesirable behavior of some sheep; we look at that the family line (nature/genetics) and how it was handled (nurture).