That’s wonderful, Jason!!!! Very well done. Yes, that is a perfectly acceptable modification of the exercise and probably achieved quicker results because you are using something she loves. My personal favorites are #2 and #4. #2 because of the duration she River shows. #4 because of how much self control she is exhibiting there. I’d have jack-potted those efforts. Can you figure out a way to jackpot River with this game? It can be anything that shows her you REALLY liked that effort. It can be more excitement from you, a longer play where you get up and run around with her before doing another repetition, etc.
Do you have any truffles to work with? It would be quite nice if you transitioned directly to a truffle so she gets the complete picture…soft touch to a truffle.