Bad news -- people food such as you are using is not very good for the dog. It will mess up their nutritional balance and generally leads to a fat dog which is totally unhealthy. There are other things you could use for this new sport such as "flip chips" of rawhide or something along these lines. You also might start using a small real frisbee and train her to be a frisbee champion. Please don't use people food for her. I had one dog that we used to let lick plates after we were through (I know -- sounds awful) and she got quite fat. Once we stopped the practice, she dropped weight and at 11 years of age, looks great. Maybe you could just use some of her regular food and teach her to catch. It's a very impressive trick and makes you and your dog look very clever.