Credit for just about all of this goes to Donn Yarnall. It's from a chapter of a book he's writing about K9's in police work. It's not the entire chapter, but it's enough to get you started.
It's controversial but only among those who read it and don't try it. I'd suggest using food drops (hereafter referred to as FD's)to slow a dog down. I know that it can lead to such problems as feeding off the ground but once the dog has the idea and is working slowly you can correct him for that.
Most of the tracking that we do in police work comes from what civilians do in competition tracking. While that works it causes problems for us. It makes it virtually impossible for us to use any kind of tactics.
I'd suggest that you start your tracking training over from the very beginning. The fact that he knows how to follow disturbed ground scent will make it go much easier.
I'd do all the training at night so there were few distractions and it would also make it harder for the dog to see the FD's.
You can start this from off leash if you like or if you're not sure of yourself, there's nothing wrong with starting on leash. In this training the dog always starts by crossing the track at right angles. There's no scent pad used. The very idea is foreign to police work. I don't think it's necessary for give a dog "more" scent. No wild animal gives a wolf a scent pad and a human shouldn't have to either. You're going to start the track "near" but not at the beginning. This is going to be easy. Go to a park where you know the wind currents and terrain.
There's only going to be one human track on the entire field that has hot dogs on it so it will be easy for the dog to hit it once you lead him to it. this makes use of self discovery, the dog will find the start of the track by himself, and self motivation, he wants to eat the hot dogs.
It's probably best if you lay the tracks for your own dog so that you will know exactly where it went. There won't be any setbacks from assistants who try to play games on you. Lay the track across the wind. If you head into the wind the dog will scent the next FD and will hurry to it, defeating your purpose. If you lay the track with the wind the dog may try and backtrack to an FD that he missed.
DON'T lay a straight track with 90 degree turns. It will just cause problems later. Instead, make the track with rounded turns, so it looks like a snake, a series of connected "S" curves.
Put a 30 foot line on the dog and let it drag on the ground as you hold onto it about 5' from the dog. Let him wander with you into the wind towards the track. He'll bump into the hot dog scent and will pull you to it. DON'T give him any commands. This, as most superior training is about the dog and the scent. Don't impose yourself into the picture; you'll just screw it up. When the dog finds the treats allow him to savor each one.
DON'T point to the track or the FD unless the dog overlooks it or becomes distracted. If you have to do this make it as subtle as possible. Sorta lead him in a circle and let him find the scent again.
Here's a tricky part. As you near the end of the track, about the last 5-10 paces, when the dog is fully focused on a treat, gently and quietly ease him away from it. Hold the leash below waist level. Don't jerk the lead, give any commands or even speak so that the dog think that he's being corrected. Just EASE him off the track 1'-2'. Then let the dog pull you back to the track. Do this a couple of times as he's nearing an FD. As he pulls you back to the track/FD praise him. Not so much that he loses focus, just enough to let him know that he did the right thing.
The third time that you do this continue to pull him away from the track. Break into a run when you are about 10-15' from the track and break into a play session. Stop the play and put him up w/o any OB commands.
An important part of this is the spacing of the FD's. It's a seven day program with three tracks done on each day.
DAY 1
1st Track 10 paces - food drop on each step
2nd Track 20 paces - food drop on each step
3rd Track 40 paces – starting random food drops
Day 2
1st Track 20 paces - food drop on each step
2nd Track 40 paces – starting random food drops
3rd Track 80 paces – random food drops
Day 3
1st Track 40 paces – random food drops
2nd Track 80 paces – random food drops
3rd Track 160 paces – random food drops
Day 4
1st Track 80 paces – random food drops
2nd Track 160 paces – random food drops
3rd Track 320 paces – random food drops
Day 5
1st Track 80 paces – random food drops
2nd Track 160 paces – random food drops
3rd Track 320 paces – random food drops
Day 6
1st Track 80 paces – random food drops
2nd Track 320 paces – random food drops
3rd Track 80 paces – random food drops
Day 7
1st Track 80 paces – random food drops
2nd Track 640 paces – random food drops
3rd Track 40 paces – random food drops
This training them turns practical with decoys and bites at the end of them but this is too long already. Again this is from Donn Yarnall. I've used it a few times and it works great, but it's his idea and his FD schedule.
Lou Castle has been kicked off this board. He is an OLD SCHOOL DOG TRAINER with little to offer.