This issue comes up every once in a while in my discussions and training sessions with students and potential students. Personally, I’ve never ran across a dog that’s not food motivated, and I don’t really think they exist. Any dog that is in decent shape and is hungry is motivated by food.
There is a lot more to a vault than the definition. There is a reason you can’t just watch a YouTube video and get an understanding of the vaulting process. Just because you can do something doesn’t mean you know how to do it, or how it is done; performance is not understanding. This is very evident when it comes to vaulting.