Went to Petsmart and bought one of the real cow rib chews and my girl loved it. She chewed and chewed on it, which was great, until yesterday. She "broke" into it and essentially broke it into pieces, short (1" to 2") shards of bone, that were very sharp. They were the size where she could have, or maybe even did, swallow them. I hope I got to them in time so that none were swallowed and cause any internal damage. No issues so far. Be careful, they have such strong jaws.