Tongue diagnosis has long been an integral part of Traditional Chinese Medicine (TCM). The healthy tongue has balanced mobile (Yang) and moist (Yin) qualities. A healthy tongue should also have enough Blood to give the tongue a pink hue that varies with the species and age of the patient. The Stomach Qi should be strong enough to generate a thin clear or thin white coating. Excesses and Deficiencies of Yin, Blood, Yang and Qi have distinct correlations in the tongue producing recognizable qualities such as: a thick white coat (Yin Excess), red dry tongue body (Yin deficiency), purple tongue body (Blood Excess), pale dry tongue body (Blood Deficiency), thick yellow tongue coat (Yang Excess), pale moist tongue body (Yang Deficiency), lavender tongue body (Qi Excess) and pale swollen tongue body (Qi Deficiency). Pattern differentiation (Bian Zheng) based upon these tongue qualities can lead to rational treatment strategies and improved clinical outcomes. Some examples of general acupuncture and Chinese herbal medicine prescriptions are presented to treat animals that have characteristic tongue quality changes associated with different disease Patterns.