We have quite a few rangey earth's but shallow, ideally I don't really like something with too much range for a terriers first or second time to ground just in case it pushes passed and the terrier struggles to find again, I like somewhere which is quite small and if he does get past the dog then with a bit of determination and maybe a bit of courage from the owner when the dog looks Confused usually it's job done, as fat man said build up confidence is what we try to do. I must say though I do like it when a young dog has to work for it, they got to learn it's not all going to be plain sailin