I think one answer lies with the 'breed type' from the kennel club. I do stand to be corrected as I dont know a lot about it, but at Crufts they say things like 'this breed should have this, that or the other ' and some of those are not natural for the dog. Tails don't need to be docked, boxers should have a longer snout etc. Many dogs have inherited problems with their backs, legs, ears, skin folds from selective breeding. If we can breed natural features out, we can breed them back in though it will take time.