Tartar or calculus are calcified deposits on the teeth. They are formed by the continuous presence of dental plaque. As tartar has Its rough surface provides an ideal medium for further plaque formation, threatening the health of the gingiva. Calculus absorbs unaesthetic stains far more easily than natural teeth.

Theobromine, is a bitter alkaloid of the cacao plant, and is therefore found in chocolate. It is in the methylxanthine class of chemical compounds, which also includes the similar compounds theophylline and caffeine. Same as caffeine, theobromine is potent stimulant of nervous system. However, theobromine is much more potent heart stimulator.

The amount of theobromine found in chocolate is small enough that it can be safely consumed by humans, but animals that metabolize theobromine more slowly, such as dogs, can succumb to theobromine poisoning from as little as 10 grams of baker’s chocolate for a smaller dog and 150 grams for an average-sized dog.