Try this before you start tracking training. Lay out a 50 mtr trail on a grass field use blood and a deer hoof. leave deer hoof at the end of the trail. Good idea to mark the trail with sticks so you can see where it go's. The white plastic electric fence post are good for marking. Now wait a couple of hours. Put the dog on his normal lead walk the dog as though you were out for a walk go so that you cross the trail about in the middle and watch the dogs reaction as it picks up the trail. let the dog sniff about but say nothing to the dog. If the dog starts tracking the wrong way just hold the lead till the dog tracks in the right direction. When the dog reachs the hoof thats the time to praise the dog.
Any type of blood will do to lay a trail, deer, boar, cow It do's not matter what type of deer hoof you drag don't matter either.
The secret with tracking is not to get the dog worked up before you track and to get the dog to cocentrate keeping its nose on the ground and not air scent.
Its a good idea to start training tracking before you do any hunting work.