08/03/2024
Over the past two years our team has intensified our interest in scent movement. Often upon entering a training search area a handler will set off a smoke bomb and allow the colored smoke to drift through the area. Many of our subjects will move into position, sit down, take their packs off, and promptly set off a bomb and watch the smoke. At the close of many training exercises after a K9 team has found the subject we will sit down, the happy proud dog with his or her toy, and the rest of us will watch the color, again, of another smoke bomb, and marvel over how the wind and scent conditions -- some extremely subtle -- have changed over the course of two to three hours, or more, depending on how long the subject has established a scent pool.
Sometimes, these checks offer us explanations for K9 behavior. We begin to understand why a dog suddenly gained interest or offered a change of behavior a quarter of a mile away, or suddenly shifted down hill or up ridge or into a draw before veering into a find of a subject. We can watch -- as we did recently -- a haze of smoke move and settle in a certain area and understand why a dog turned suddenly towards a subject.
But truth to tell -- the movement of scent can still be a great mystery, one that we will work a lifetime to understand. At a recent certification test earlier this year in the Spring, the team member who placed the subject up a narrow draw that cut into a ridge set off a smoke bomb early in the morning deep in the shade, where the sun had not touched a portion of the ridge -- and watched unhappily as the scent moved upward and behind the subject -- something that typically would not happen.
Much later, in broad daylight and in sunny conditions, an area search dog caught the subject's scent from **well below** while trotting down a trail, crossed a stream, entered the very narrow draw, and moved upward to the subject. Clearly the scent had reversed directions and flooded downhill.
Over time we have added knowledge that has added further complexity. For instance, if a subject arrives early one morning and takes up her position "mid-ridge" -- perhaps halfway down the ridge, and the sun is warming the ridge, will the scent rise, as it is warmed?
It depends. Is she on the east side of the ridge? Or is she on the west side? Because on the west side of a ridge in the morning, the scent will take much longer to warm than on the east side of a ridge. And on the west side of a ridge in the late afternoon it will take longer, typically, for the scent to begin moving downward -- unless there's water downhill or unless . . .
You get the picture.
[By the way, the dog caught the subject's scent from below, much later in the morning.]
No matter how much we train and prepare and work, the reality for all of us is that when we enter the outdoors and work a dog, we walk into a mystery. It is a place of awe and wonder and curiosity and humility.
Those are good characteristics for any effort in life.