This recipe is soluble and easy to digest, making it safe for your dogs. This was an important priority, but the other priority was to make apliable texture that would allow the teeth to sink in, effectively scraping the surfaces to remove plaque. When dogs chew the treat, they will remove existing plaque from the surface. This is important to prevent the build-up of tartar. Plaque turns into tartar when it is allowed to stay on the surface of the teeth by binding with minerals in the saliva. Mechanical action is the most important way these treats keep the teeth clean.