Nobody has ever consistantly produced the "perfect " diggin dog ,any line needs sounders mixers as well as hard uns to continue that line over a long period of time ,it how you but the two together that matters .If that means you have to add blood from outside that line from Wheaton ect so be it as long as the blood you use is tried and tested and comes from an established line itself .Buck,bray ,gould,nuttall ect all did, have, would, will use game dogs from time to time in there lines i rest my case .