We’ve been using this product for three weeks now. Built up slowly for the first two weeks and have now been on the full dose for one week. As my dog will not allow her teeth to be brushed, kelp powder was recommended. She also has a daily chew of shark cartilage and roo bulb tendons on alternate days. Hopefully, this will keep her teeth and gums healthy. It was recommended to me to change, and wash, her water bowl daily as, if using a gravity feed or water fountain that doesn’t require daily changing, some of the softened tartar can be deposited in the drinking water and taint the water possibly causing stomach upsets. Her breath smells wonderful!