Goubao is a stone found in the stomach, gallbladder, kidney and bladder of canines and can be used as medicine. Dog babies are mostly spherical or elliptical, generally 1 to 5 cm in diameter, with a gray-white or gray-black surface, slightly shiny, and multiple round-like protrusions. The texture is strong and delicate, and scratches can be seen when you scratch it with your fingernails. The cross-section is white or tooth-white, with concentric annular layers. The near center part is relatively loose, but most cannot be separated. The smell is slightly fishy and the taste is slightly bitter. It has a powdery texture but no sandy feeling when chewed.

Goubao is a traditional Chinese medicinal material in my country. It has been known as the "Three Treasures" together with bezoar and horsebao since ancient times.

Goubao is a hot-selling commodity in the domestic and foreign pharmaceutical markets, and is urgently needed by pharmaceutical, foreign trade and other departments in various places.

Source: Canis Canis familiaris L. stomach stones. Peel off the skin, membrane, meat, etc., wash with clean water, and dry in the shade.

The shape is spherical or oval, varying in size, generally 1.5 to 5 cm in diameter. The surface is gray-white or gray-black, slightly shiny, and has many round protrusions. It is heavy, solid and delicate, and can leave traces when carved with a fingernail. It is broken and shows concentric annular layers. The area near the center is looser, but most of it cannot be separated. The smell is slightly fishy and the taste is slightly bitter. It has a powdery texture but no gritty feeling when chewed.