It is a myth that kibbles clean teeth. Would you eat cookies instead of brushing your teeth? Same idea.
Look into Pro-Den Plaque off, you sprinkle on their food. I have used it with success and have heard the same from others. No matter what else you add to food or water, you need to brush their teeth. I use coconut oil and a bit of baking soda. Most dogs like coco oil and it has many benefits. I use a finger brush, kind of looks like a sewing thimble, my dog tolerates that better than a regular brush. Could also try wrapping some gauze around your finger and rubbing with that. Keep trying, dental care is so important, especially with small dogs.
