I do not think an earth dog is comparable, just an alternative working terrier. Heideterrier would be my next choice but that kennel you linked to does not respond to my emails. I also have never been around Heideterriers and understand they vary a lot. The Jagd that I owned was too hard and so have been the couple of other Jagds I knew. I need good sense in a dog.
A frozen straw or two only works with a good storage system which I do not have.
dogguy