IN 11 SEASONS OF DIGGING IV E ONLY LET THE TERRIERS HAVE A RAG ONCE OR TWICE,POINT BEING IS THE EARTHDOG NEEDS TO GET IT INTO HIS HEAD THAT HIS JOB IS IN THE GROUND.PERSONALLY I THINK IT ENCOURAGES DOGS TO LEAVE QUARRY IN A HOLE AND COME OUT IN CASE ITS MISSING SOMETHING,DIFFERENT WAYS BUT I GUESS THATS WHY WE IRISH HAVE BETTER DOGS NOWADAYS