This study was conducted to compare to compare ileal digestiblity of amino acid in distiller dried grains solubles(DDGS) from ethanol production and DDGS from beverage production. The results confirm that the digestiblity of lysine is more variable among sources of DDGS than the digestibility of other amino acids. However, the standardized ileal digestibility (SID) of amino acids among DDGS sources vary within the regions tested. It was also concluded that the amino acids in DDGS from beverages may be just as digestible as DDGS from ethanol production.