“…Such compounds are toxic to monogastric species, such as chickens or pigs, but have no obvious effect upon ruminant species, including beef cattle (Valentine and Bartsch, 1996). The proportion (w/w) of common vetch seed within feeds that can be safely consumed without deleterious effects is 10% for piglets and 20% for adult pigs and for chickens about 40% (Harper and Arscott, 1962;Rathjen, 1997). In addition to the main toxin GBCA, other anti-nutritional compounds were also found in common vetch included vicianine, vicine, convicine, and tannins (Ritthausen and Kreusler, 1870;Rathjen, 1997).…”