I know with Drahthaars the blood track is basiclly one of the last portions of training that you do. You can start it on simulated tracks suck as breaking apart bits of cheese, burger or hot dog and laying a trail as a puppy. you may be able to start the Daschunds earlier as they specilize more in the blood tracking try this website. www.borntotrack.com they have daschunds and I they have a book on bloodtracking and in the links section they even have a forum for tracking dogs. http://www.thetroutbum.com/messageboardfr.htm Hopoe this helps.
Scott