Bests & Worsts Reviews from Amazon

3 out of 3 Labradors say these are the greatest. 5 paw er star rating... Many hours of chewing pleasure observed by humans. UPDATE: I would be remiss if I did not update this review and downgrade to 1 star. Here's why: Yes the dogs do love them, BUT... My Labs chewed on them happily for a 2 days, then two of the three started getting sick and vomiting all over the house. Without being too graphic, an examination of what we were cleaning up revealed that it was all "bone" fragments, many of which were sharp shards of the whatever substance comprised these "bones." I took all 3 of the "bones" and threw them in the trash. The sickness ceased soon thereafter. That is conclusive enough for me. I won't be buying any more of these for my girls.