There's really no way to know this for certain and it may take some time before your dog fully gets the hang of it. Keep in mind that you're introducing them to something new and unique and that they might take a bit to comprehend what it is they're meant to do. Their goal is always to please you by remaining loyal, so be sure to praise them appropriately when they do something right while playing with their puzzle. Show them that there are hidden treats to find and encourage them to sniff others out. It's work, but it's worth it!