Even after all the horror stories & negative reports, we still give Toto greenies but only after getting advise from our vet. He credits them for her beautiful teeth! She flatly refuses hard food so it's the only hard thing that she chews on. He says that if he were not certain that we never take our eyes off her, he probably wouldn't advise it but we watch her 24/7 and especially when she is having her "treat"! She was two last July and has never had a speck on any of her teeth!