We found the first one of these wonderful balls on a little weekend get away, my Hubby & I. We bought it as a gift for our Border Collie as she never tires of fetch and we use a chuck it and after awhile tennis balls either break or make her breath stink. Since she has been fetching this Bow Wowzer ball, she has not only had better breath, but her teeth are amazingly cleaner. She had a pro vet cleaning and she only eats hard food like dry dog food, and bisquits. But this ball has done what none of them has ever done, clean her teeth and keep them clean. I had to come to this site and order more. Now if I can just get my Lhasa Apso mix to fetch one of these a few times a day his teeth will be clean too.