It’s funny, what dogs find rewarding, sometimes. Many years ago, when I was first introduced to agility, I saw someone firing a supersoaker at their dog. The dog was literally yelping with joy, jumping up to catch the water in their mouths and wagging all over. I’ve heard about other dogs who go gaga for lettuce! If your dog is less than enthused about your rewards, try new ones until you find something that works for both of you!