The Jagdterrier is a great dog.
It's a 100% game dog, but there are a lot of several bloodlines, some are too big so they are used for wild boar others are too strong and fearless so often dies down in the hole when meets a brock.
In Italy we are try to select more balanced dogs, with more brain, i think that the first results are going on..
If you want a Jagdterrier you have to move out of GB, if I can give you a suggest come in Italy to find your dog or in Germany or Osterraich, because if you go too in the east of Europe u risk to find tto fearlees dogs.
Good luck, Nino.
MY BITC