Training for ORT (odor recognition test)

Keaton and I hope to get in to an ORT in a few months, so we're doing a lot of ORT box searches. He can always find the odor, though I'm still working on understanding his exact behavior when he's "on odor." In all the searches seen here, except for the very last one, I know which box the odor is hidden in so I can quickly reinforce him at the box (at source). In the last search, it's a blind hide, meaning I don't know which box the odor is in. Many thanks to Brad Waggoner for helping set boxes!