My standard poodle has had the Huck (large size) less than 30 minutes and he has already chewed chunks off the raised portions of the ball. While I don't question the quality of the product, it isn't indestructible (not that the ad promised that), which I was hoping for. My soft-coated wheaten terrier is doing better with the Hurley (large size). She's still chewing on it and hasn't done any damage yet. Of course, she's 30 pounds lighter than the standard poodle. If anyone has a suggestion of a good product that isn't rock-hard rubber, please email me at huttly@comcast.net.