I have a puppy and I wanted to start her on good dental hygiene as early as possible to head off any potential problems so I purchased a couple different kinds of dental chews including these since I have purchased other Greenies products before and they were wonderful. These were not received well at all. She sniffed at it and walked away. She just outright refused to eat them and she eats virtually everything. I tried the Original, Bursting Blueberry, and Grain Free and all were a bust. She refused to even get close to the blueberry ones! The grain free variety got a lick, but that was it. These are very cute with a green color and a toothbrush like shape unlike similar brands which don't have the cute factor. However, these are also more expensive than other brands at about $1 per chew for the regular size - a pack of 12 runs you about $12 or $13 dollars online and in most chain pet stores. Comparable brands are about half that price. Overall, since my dog just refused to eat any flavor of these they were a complete bust and I can't recommend them.