Instruct: Classify a given Amazon review as either positive or negative.
Query: large dental bill

I purchased these because I thought they were safe for my dog. I was horribly mistaken. My dog cracked two of his teeth, chewing on this. I heard the crack and saw the blood on the bone. I took him to the vet and he had to have two cracked teeth removed. This product should not even be on the market. Had we not caught this, the vet told me, that there is no warning for a tooth infection and dogs can easily die. Do not buy this product. I cannot believe that the company continues to market this. This product is hurting the dogs. It was a very hefty dental bill and I haven't even addressed what my dog went through having to be put under and not have a major molar to chew his regular dog food.