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A finishing trial evaluated effects of feeding greater than 70% wet distillers grains plus solubles (WDGS) on feedlot cattle performance. The WDGS was fed at 40, 70, 77, and 85% of diet dry matter (DM), while roughage levels ranged from 5 to 25% across treatments. Larger ADG and G:F were observed with 40% WDGS and 5% roughage. Higher levels of WDGS were successfully fed with levels of roughage above 8% but the diets were less profitable than the 40% WDGS diet.