Chase the Turtle Sniffing Dog - 1st time with non targets introduced

I've been working with Chase with target (turtle scented rag) only and pairing a treat inside the can with target odor. He quickly graduated to being rewarded the treat when he hits the target odor, then I worked on a delay (1-2 seconds). He is much more comfortable with his nose in the cans vs the very beginning a couple months ago. This video shows his first attempt at introduced non-target odors (unscented rags) in the mix. We've been working in the early am when its cooler and moist outside so I also changed this up with him working with him in pm with the non-target odor change.