Wilf you seem to have become caught up in the terrier world , I wouldnt let people who sell worry you . I dont no if you work them but i am sure if you wanted one you wouldnt be getting it from the source you seem to be getting stressed out by . No point letting things you have no power in stopping wind you up , You will give yourself a heart attack .At the end of the day if you put no homework into buying a dog expecting it to work you deserve what you end up with .