The video is a bit long but I thought it was interesting to see how he double checks the puzzle before checking in with me. Deuce loves this interactive puzzle. I found it on Amazon. I use his kibble for the hunt. Just gave him a little haircut and a bath so he needed some kind of treat. He likes working for it.
https://www.youtube.com/watch?v=Nz9hFbBkIE4&t=36s
Enjoy!