Generally speaking, there are many reasons for this.
First, the pollution of the surrounding environment, such as the increase of water quality and soil chemical elements, is not conducive to the growth of animals and plants.
Second, the disharmony of the surrounding environment in rural areas is also called disharmony of geomantic omen, which requires some management of geomantic omen, such as the scientific utilization of sunlight, soil and water, and the complementarity between man and environment.
These will directly or indirectly affect the prosperity of six livestock.