But because it ’ s time-consuming to raise ducks and duck meat is thus expensive, the supply of duck blood couldn ’ t meet demand. Moreover, because chicken ’ s blood doesn ’ t congeal well, gradually pig ’ s blood began to replace duck ’ s blood.
然而鴨肉價高、養育費時，鴨血供不應求，而雞血又不易凝固，於是漸漸以豬血取代鴨血，成為「豬血糕」。