We have absolutely no way of knowing. Maybe yes, maybe no.
What if they were bred and only their clear progeny campaigned and bred. What would the answer be then? Again, we do not know.
Maybe if there was a test 20+ years ago, some of the progeny of these dogs that were non-carriers would have gone to competitive homes instead of the carriers. Maybe the brothers and sisters of these great dogs would have also been succesful and their lines would continue today. We just do not know.
What if they were bred and only their clear progeny campaigned and bred. What would the answer be then? Again, we do not know.
Maybe if there was a test 20+ years ago, some of the progeny of these dogs that were non-carriers would have gone to competitive homes instead of the carriers. Maybe the brothers and sisters of these great dogs would have also been succesful and their lines would continue today. We just do not know.