Tartar build-up on your dog's teeth not only affects their appearance but can also impact on his or her wellbeing. After your dog finishes eating, bacteria will settle on the teeth resulting in a soft film called plaque. If this is not regularly removed, over time calcium which is naturally found in saliva will stick to the plaque turning it in to tartar also known as dental calculus. Once formed tartar cannot be removed by tooth brush or chewing and requires a scale and polish under veterinary supervision.