"My two-year-old 60lb. lab mix absolutely LOVES this toy. It keeps her engaged for HOURS, whether it be chewing on it, fetching it, licking at it, or just tearing it apart. It's lasted well over a year, and we're getting a new one now mostly because she's managed to completely remove the felt covering from each end of the toy. The bouncing is, as noted, very erratic, so don't expect it to go in a straight line or bounce once and stop. All in all a great, durable, highly enjoyable addition to my pup's toy repertoire."