I have given these Hartz Dental Chews to my dog for a couple months and I think they are just okay. My dog seems to enjoy them, like she does almost any treat that I give her, she is not very picky when it comes to treats. But I do not know if they are doing anything for her teeth. After giving these to my dog for a couple months, out of curiosity, I asked the vet if they noticed a difference in my dog's teeth, she said that she did not. I also do not think that these did anything to freshen my dog's breath either, actually, I think they made it smell worse - like meat. Overall, I think these are a good treat for your dog if they like the taste, but I am not sure if they do anything beneficial for dog's teeth. So if you are looking for a new and affordable treat for your dog, give these a shot, I think the bacon flavor is something that a lot of dogs would really enjoy.