Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: NOT for aggressive chewers
Review: I purchased this for my (at that time) ten month old Airedale puppy. Withing a half hour or so, she had a chunk out of one of the rings. I took it away and she proceeded to chew a chunk out of the second ring. I learned my lesson (I had thought that the black ring might be tougher, but it wasn't) and threw the pieces and the remaining intact ring away.
