Personally I would not waste my time looking for that dog but if ever I stumbled across it I would be happy to give it bed and board. Smaller dogs for tight spots and bigger dogs for wider spots. A good dog is a dog that is good at its job so then a dog shouldn't be judged as a bad dog when really it's normally the owners fault for not working the dog to its strengths. In an ideal world you would want a couple of each type of terrier and not expect any 1 dog to do a job in a hole it's not suitable for. That's just my opinion happy hunting