My chocolate Lab, Java, will puncture a plastic Frisbee on the first retrieve, and destroy it in a single throw session. After 15 months of throwing sessions, the Zisc is no longer in service, but only because it got lost in the yard by throwing in the dark. Unlike the the other Zogoflex toys, he does need to be supervised with this, as the center can be punctured or torn. This is not a design flaw, but a result of needing to make the disc so it actually flies without breaking your arm throwing it!