A couple of weekends ago, my friend and I tried burying scent vessels in the dirt so that we could practice Scent Work Buried Excellent with our dogs. (The scent vessels contain the swabs that have the odor on them — the vessels prevent the odor from coming into direct contact with the dirt.)
It mostly went OK until we tried to pull the scent vessels (1″x2″ test tubes) out of the ground. I had tied fishing line onto the vessels and thought I could use that to pull the vessels out of their holes. I figured, if the fishing line could withstand a fighting fish, it ought to withstand my pulling a small test tube out of the ground.
But no. The fishing line broke, and when it broke, we lost visual contact with where exactly the vessel was buried. (Losing visual contact is actually the point, or at least will be. During a scent work trial, neither the dog nor the handler is supposed to be able to see where the vessels are buried.) We’d make a mental map of our search area, so we knew sort of where the vessel should be, but we ended up having to dig around a bit to find it. Definitely not a leave-no-trace situation.
Part of the reason why the fishing line broke was that we hadn’t actually dug holes first and then dropped the vessels in the holes. We dug very short holes, but mostly we had to push the vessels the rest of the way into the ground, and they got stuck in the mud.
Thus, no holes + fishing line = stuck vessels. Not good.
So I redesigned my vessels and got myself an auger to dig holes that are just a bit bigger than the vessels.
I drilled a small hole in the bottom of each test tube. (There was already a hole in the tube’s lid.) I then strung mason’s twine through the tubes, making a big double stopper knot at the bottom to keep the test but on. I also added a bead between two regular stopper knots about 3/4″ above the screw-off lid of the tube. That way, I can add a swab to the tube without losing the lid.
Then I put in a small knot at 6″ to help me be sure the swab inside the tube is 6″ deep. (When we get that far. Carlin isn’t able to detect scent buried that deep yet, but he’ll get there. I hope he gets there soon enough for the March trial, where he’ll be entered in Buried Excellent. The hides at that level are 6″ deep.)
I added another stopper knot at 8″ (that’s how deep the hides are in the Master level). Lastly, I strung a bead and another stopper knot that should help me grip the line so I can pull it out when the tube is at its deepest.
I used blaze orange twine with a little tape flag because I can see it when it’s peeking above the ground. At least for a while, I need to be able to see where the hides are so I can reward Carlin when he’s right. I also used orange because, theoretically anyway, dogs don’t really see orange as orange — they see it more like a gray. (Or at least, that is what I was taught by multiple retriever and spaniel trainers who all use orange dummies when they don’t want their dogs to see the retrieve object.)
Yesterday, I tested it all, putting the tubes out at 4″ deep. I used the augur to create 4 holes in a gravel-dirt mix area, put the vessels with swabs in them in the ground, and lightly filled up the holes with about a couple of inches of twine sticking out. I left them there for about 30 minutes to give the odor a chance to start moving.
Then Carlin and I came back to the area and searched. He had an easy time finding the ones that were not near any objects, and a bit harder time finding the ones that were near above-ground objects (logs, mostly). But eventually he found them all.
And even better, when I went back to pull the vessels out of the ground, they all came right up, with almost no effort. I replace the little bit of displaced dirt, and when I left the area, it looked like nothing had happened there at all.
Thus, augured holes + mason’s twine + good dog = success. Good!
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