Falcon0r said:
A good way I was explained on how dog's smelling works:
A human smells a pizza. A dog smells dough, cheese, tomato sauce, salt, pepper, garlic, and whatever else was put into it.
As said in the thread already, if you mask it with coffee, the dog will smell the drug, and it will smell coffee.
Dogs can be trained to smell anything. It is just a matter of what is practical and not.
And Ecstacy is REALLY scary because if the dog is trained to smell Amphetamines or Cocaine and your Ecstacy tab is cut with that, guess what, your busted.
Another metaphor I use is that, for dogs, their sense of smell is like our sense of sight. Imagine standing in a room, with the lights off, and only a tiny little bit of light coming in from under a door: you can see the walls, sorta, and it looks like there's some framed photos on them, or maybe paintings. Or maybe they are windows? Hard to tell, and there's no way to see color.
Metaphorically, this is the human sense of smell. It works, but it's really vague and can't tell stuff apart very well.
Now, imagine that room with good, full-spectrum lighting. The walls are actually filled with amazing photos and paintings by all the masters. There's color everywhere, the room is awash in images. And there's windows to the outside, with people walking by in colorful summer clothes. There's funky sculpture objects hanging from the ceiling, rotating in the slight breeze and throwing mirrored reflections around the room. The whole place is alive.
Metaphorically speaking, that is a dog's normal sense of smell.
So, hiding a smell by masking it with something else, for a dog, is like trying to "hide" the color red in a painting by holding up a semi-translucent piece of paper in front of the painting: the red is still visible, only a bit hazy through the paper. Or like hiding the sound of a baby crying by playing the flute.
I am aware of no proven methods to "beat" a drug dog by adding compounds to a substance. And while I am aware of two (hypothetical) approaches to this problem, I am not aware of any practical implementations of either that would be available in everyday life. One can take steps to minimize the risk of detection, equivalent to turning down the lights in the metaphorical room full of paintings from earlier in this post, but driving that risk to zero is a tall order.
Peace,
Fausty