Finally a frisbee my Blue Heeler does not destroy. I've spent hundreds of dollars on frisbees because they provide her with plenty of exercise. As soon as they break down she wants to rip and tear. I bought the zisc 3 months ago and she lost it under an uprooted tree last weekend. As I was cutting rounds off the tree the stump suddenly stood upright. Zowie let me know with her barking that the frisbee was under the stump but too late to save it. Fortunately REI was able to get me a couple more.