Tartar, also known as calculus, forms in your dog's mouth when plaque—a soft, sticky substance—builds up on the teeth. If plaque is not removed, it hardens over time due to minerals in the dog ...
They detected a milk protein called beta-lactoglobulin (BLG) in the tartar of seven individuals spanning early to middle Neolithic times. "Proteomic analysis of calculus is a fairly recent technique.