Agrarian practices consist largely of subsistence farming and animal husbandry. Several smartphone apps are available for agriculture, horticulture, animal husbandry and farm machinery. German farmers were renowned for their highly productive animal husbandry and agricultural practices. Agriculture, crafts, animal husbandry and fishery are the main traditional sources of income. The primary occupations are agriculture, animal husbandry, and day labor. There was a shift from grain farming to animal husbandry. The second were those involved in specialty agriculture like animal husbandry. At Arlington, Custis experimented with new methods of animal husbandry and other agriculture. Toubou life is punctuated by the seasons, divided between animal husbandry and agriculture. Animal feed is food given to domestic animals in the course of animal husbandry. There are also many ways to practice sustainable animal husbandry. Other types of animal husbandry also occurred. Life in Mustang revolves around tourism, animal husbandry and trade. Other major sectors are tourism, manufacturing, home gardens, animal husbandry and business process outsourcing. There has been extensive use of antibiotics in animal husbandry.