I saw the Bonies Natural Dental Bones for Dogs in my local pet store and decided to give them a shot because I noticed that they were made in the USA and they were a good price. The smell of these is slightly minty which I thought would be great to freshen my dogs breath, however I did not notice a huge difference like I do with the Greenies dental chews. So for freshening your dogs breath, I think there are better options out there. But my dog absolutely loved the taste of this. He is a smaller dog so he usually takes a while to go through a bigger treat like this, but he ate through this in less than 48 hours. I would purchase this again simply because my dog loved it, but if you are looking for a product to freshen your dog's breath, I would choose something else. Side Effects These did not do all that much for my dogs breath. I noticed a slight difference, however I think there are products that will do a better job out there.