I TOTALY AGREE WITH DAVE A, I HAVE WORKED TERRIERS 4 25YRS, I SAY WORKED 4 U PLUMMER OWNERS, WORKED MEANS DIGGING 2 ( 1 ) SINGLE TERRIER 2 ITS QUARRY NO MATTER HOW LONG IT TAKES THIS IS WHERE IT URNS THE TITLE WORKING TERRIER, NOT RATS,BUSHING,RABBITS, OR PUTTING A COUPLE A DOGS TO GROUND. THE WORKING TERRIER IS A SOLERTARY WORKER, NOT A PACK ANIMAL, I HAVE FIRST HANDED WITNESSED PLUMMERS AT DIGS TO MY OWN TERRIERS ON 3 SEPERATE OCCASIONS, THAY HAVE BEEN OFFERD THE WORK BEFORE MY TERRIER