"Hwangu" has been considered better for consumption than "Baekgu" (White dog) and "Heukgu" (Black dog).Around 1816, "Jeong Hak-yu", the second son of "Jeong Yak-yong", a prominent politician and scholar of the Joseon dynasty, wrote a poem called "Nongga Wollyeongga" (농가월령가).