My preference is to teach dogs that they will be rewarded for finding and indicating on the designated scents, as opposed to starting searching for food or pairing with food because I know that food distractors will be a challenge in competition, and I don't want to have to turn around and discourage finding food if I'd previously encouraged it earlier in the learning process when another option exists.  This is not to say that it can't be successfully done, or that some dogs may benefit from pairing.  All dogs are individuals.

I also like to use a marker, either a word such as "yes" or a click noise, to identify when a dog is correct.  I find this extremely helpful because I can give my dog that information independently of what my body is doing, making it easier to teach my dog not to rely on my body position or movement to solve the scent problem.

You've probably heard of dogs that can detect drugs, or bedbugs, or missing people, but there are a wide variety of jobs dogs do that put their sense of smell to use, such as:

• Drug Detection - for illegal drugs, often hidden by people trying to avoid detection.
• Explosives - for explosives or traces of explosives in airports, luggage, or large buildings
• Currency Detection - for large quantities of hidden money being smuggled across the border or in criminal operations.

What is a pink dog?  Some people in scent detection refer to dogs that tend to fringe alert, or alert on scent further away from the source as "pink dogs".  This comes from the idea that as scent moves further away from its source, that it gets a little stale.  That scent molecules are the freshest right when they have evaporated from the liquid essential oil into a gas that gets carried on air currents.