A few things you have to pay attention to when they are young for nose dominant dogs, in my experience, are recall and heel. Some dogs with a strong prey drive and nose dominant can be hard to control. They may get on a good scent and ignore you.
When I'm nose tracking I almost always use a leash, especially when blood tracking. My last dog would get on a blood trail and go nuts sometimes. He could follow a blood trail at a full run, somewhere around 35 MPH.
I used a dual tone whistle to train him, one side of the whistle was like a policeman's whistle, it was drop and freeze. The other side of the whistle was a solid tone which was recover and heel. I could also get him to recover and heel with a mouth/lip whistle, but sometimes my mouth was dry.