Originally Posted by David Taggart
Chuckit ball doesn't have any smell of its own, thus, with placing a scent into it you can train your dog to look for it with association to the scent. That is how the sniffer dogs are trained, they don't search marihuana or explosions, they are sniffing in order to find their ball. You can also get a glow ball for your night play.
I've seen you post this a couple of times. I can smell a chuck it ball. A dog definitely can. Everything has odor. Detection dogs that are trained in the manner you describe are proofed off indicating on the scent of the ball without target odor.
The dog is shown that even if the ball is right in front of the dog, the only way to access it is through finding the odor.