Hello All!
As a crazy German running a bloodhound station (free tracking service for the local hunters community, supported by the German hunting club and the government), I am pretty much into that tracking training, the "continental style"....
We keep our hounds always on the leash, they only get released to chase down a wounded animal getting off the wound coach.
That allows a strict and direct control and influence and supports also the relationship between the dog and its handler.
The rest is pretty similar, from dragged gutts, through dragged deer and then an early switch over to scent shoes plus some blood, or even without, from fresh tracks, just a few hours old to more than 24 hours old tracks... Its amazing to see, what performance these dogs can show if properly trained!