biotic mesoscopic physical object animal feed Animal feed is a biotic mesoscopic physical object consisting of any foodstuff that is used specifically to feed domesticated livestock, such as cattle, goats, sheep, horses, chickens and pigs. Most animal feed is from plants but some is of animal origin. Fodder refers particularly to food given to the animals (including plants cut and carried to them), rather than that which they forage for themselves. It includes hay, straw, silage, compressed and pelleted feeds, oils and mixed rations, and also sprouted grains and legumes. ENVO ENVO:02000047 Wikipedia:Animal_feed