I was speaking with someone who trains pups for narcotics/scent work (explosives, bed bugs, medical- some really cool applications there). Anyway, she said they train using a very unique odor that is not replicated anywhere else. There was an acronym I can't remember at the moment. This allows the dog to transition to whatever they are worked in easily. They teach them how to search, alert, and all the rest using this unique odor.
Just curious, Slam or anyone who trains detection dogs- do you also use this before the dog is specialized on an odor? I'd never heard of it before... but it seems like an interesting concept. Sorry to divert from the topic a bit, but I hope this question fits.