I bought two of these treat balls for two large breed dogs. One, (my power chewer) is a German Shepherd/Wolf mix, the other is a Vizsla/lab mix who isn't easily impressed by chew toys. I filled the inside of the ball with small treats, and capped both ends with the round treats provided. On the upside when they were actively chewing on the treat balls, they were fully absorbed, and were extremely happy with them. In about an hour and a half both dogs had chewed the everlasting out of at least one side of each of their treat balls. By three hours there were no treats left in either of them. Since the ball itself seems pretty flimsy I then took the balls away so they wouldn't destroy those too. The treats give off a nauseating smell as the dogs are chewing them as well, to the point I had to turn on a fan, and even left the room. I wouldn't recommend this product due to the high price tag, and the fact that it just doesn't deliver on it's name.