Yes totally agree , only way to confidently produce workers consistent.
im afraid as most people know very little on the subject of line breeding it’s like anything if your not sure it must be wrong and bad .
A bull grey is made up of 2 breeds …..correct ? A coursing dog with Saluki say 5 gen back is made up of a few more breeds , there is beddy , deerhound way back aren’t there ? Correct me if I’m wrong here ? So to me it’s a coursing dog not a Saluki x