Stone, on the other hand, disputes that edibles have a different chemical composition. "We train dogs to isolate particular compounds in MDMA, and it's the same with marijuana. You can mix that compound into anything and it will still alert the dog."
He's actually received edibles from the DEA for testing, and he goes so far as to speculate that even if the marijuana smell was completely removed, his dogs would still be able to find a stash without additional training and based on chemical composition alone.
Moral of the story: if a drug dog wants to find a magic brownie, it won't have any trouble. But it's still up for debate whether the dogs are actually sniffing for them.
Dan Gentile is a staff writer on Thrillist's National Food and Drink team. He is doing his best to keep his Shih Tzu off drugs. Follow him to just saying no at @Dannosphere.