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One hundred twenty crossbred steers were used to determine the energy value of distillers grains relative to corn in high-forage diets. Diets included dry distillers grains plus solubles (DDGS), wet distillers grains plus solubles (WDGS) or dry-rolled corn (DRC), with sorghum silage, grass hay, and supplement. Each block of steers, by design, had similar dry matter intake (DMI) and average daily gain (ADG) across treatments. In this study, WDGS and DDGS contained 120% and 114%, respectively, the energy of DRC when fed in forage-based diets.