Fragaria Vesca 6x, a few pellets diluted in water and used as a tooth paste will (over a period of a few weeks) loosen tartar rapidly and make it easy to brush or flick off. It’s no complete substitute for a professional cleaning, but if the dog’s health makes a dental cleaning not an option, this might be something to consider. I used this a few times a day on an elderly dog who’s health made the vet leery of putting him under, and though I was skeptical that it would work so well it really did. The tartar didn’t “disappear” but it softened what was there enough for me to use my fingernail to flick some of it off. The vet was very happy with our progress with this.
