My aging dogs teeth were very dark and she had bad breath . I thought I’d give earthbones a try But wasn’t sure she was going to like them. I received the earth bones in a Timely manner and to my surprise my dog loved them! I gave her one a day and she looks forward to her time with her earth bone . And not quite at 30 days I noticed my dogs teeth had lightened up considerably! I wish I had taken a before and after picture because I was so surprised to see that they would have gotten that much lighter and cleaner. Her breath has also improved some as well . I would’ve never dreamed that they would’ve taken off all that plaque off her teeth! These are a wonderful product and after buying them a few months I decided to get on the auto deliver. I would always run out and she had a 3 to 4 day wait until they were delivered. She knows the difference between these and her milk bones and gets super excited to have her Earthbone daily . Thank you so much for a great product ! A forever fan !!