We haven't had the Jive ball for long but so far it's undamaged! Our little Pitbull has worked on it several times but been unable to get it far enough back in her mouth to be able to really put the bite to it. I think the grooves in the ball make her think that maybe she can really get a hold on it so she continues to try--making it a great toy. She likes to have us throw it.
We also appreciate the free replacement of the Zisc that she succeeded in destroying. We'll try to keep control of that one so she doesn't have a chance to destroy it.