I have a soft spot for Irish terriers, but it would be very hard to dig on an Irish terrier, so I stay by JRTs. But it would be nice to know more aboutr your Irish terriers! :-) What lines you use (she seems like some KC line), what quarry they work and how?
In Central-Eastern Europe there are more people work Irish terriers on blood tracking and wild boar hunts, they use KC lines.
YIS