Distillers dried grains with solubles (DDGS) is a co-product from the dry-grind ethanol production. However, quality and nutrient content of DDGS may differ among sources and origins and new technologies allow for production of DDGS with different chemical compositions as well as nutritional values. Recently a high-protein distillers dried grains (HP-DDG; ProCap DDGS, Marquis Energy, Hennepin, IL) was introduced and the HP-DDG has greater concentrations of CP and fat, but contains less fiber compared with conventional DDGS, which may affect the digestibility of AA in HP-DDG compared with conventional DDGS. There are, however, no data for the digestibility of AA in this new source of DDGS. Therefore, the objective of this research was to test the hypothesis that standardized ileal digestibility (SID) of AA in HP-DDG is greater than in conventional DDGS when fed to growing pigs.