Biodynamic wine is made with a set of farming practices that views the farm or vineyard as one solid organism. The ecosystem functions as a whole, with each portion of the farm or vineyard contributing to the next. The idea is to create a self-sustaining system. Natural materials, soils, and composts are used to sustain the vineyard. Chemical fertilizers and pesticides are forbidden for the sake of soil fertility. A range of animals from ducks to horses to sheep live on the soil and fertilize it, creating a rich, fertile environment for the vines to grow in. Biodynamic farming also seeks sustainability, or leaving the land in as good or better shape as they found it for future generations.