The dog I purchased this ball for chews everything. She is part Pitbull so she has powerful jaws. Since her ball came in the mail, she has been chewing it excessively. There are teeny tiny little teeth marks on it...maybe three or so. Other than that, the ball is in great shape. She throws it herself when everyone is too busy to play with her. It goes all over the place b/c of the unique shape and it keeps her highly entertained. I'm thrilled I found this ball after reading about favorite toys for Pitbulls. The price is very reasonable and it's worth every penny. I will recommend this ball to all my friends for their dogs. We got the tennis ball sized one so she can easily retrieve it. I love playing ball with her. She's been through so many!! Unfortunately, they always wind up in the trash. :( I love that we don't have to worry when she wants to chew it in between throws. Awesome product! Thanks so much!