Oh lord, a lady I once knew bred and trained them for conformation and obedience. Typical of a terrier, they have their own minds and are very headstrong. You have to convince them that they should do something. All of hers were very well trained but they were still little terrors. If you like that kind of dog, then then they are for you, but otherwise I'd do a lot of research on them if anyone were to get one. She also had Norfolk terriers.