I don't know how you all feel about DentaStix, but I give one a day to Jack and Izzy and Jack has not had to have a dental yet - he will be 4 in May and my vet was amazed at how good his teeth were. I also supplement that with the Tropiclean Gel and just now started brushing (always had to fight with Jack but Izzy loves it) with CET brand pet toothpaste. I am interested also in other more natural ingredients as I am trying to go more "green" in every aspect of my life. (Wish us luck on that one)...