Been doing terrier work with my dad and experienced terrier men for over 30 years and never heard as much crap about digging in all my life. I mean these were men digging to terriers about 5 days a week done sandy earths and eArths below the road and I can remember when the deben mark 1 came in . I seen us still at digs at 8, 9, 10 o clock at night when there were no locators and experience was the answer. That was terrier work