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Four years of data were summarized to evaluate yearling performance on smooth bromegrass when supplemented with dried distillers grains (DDG). On average cattle were supplemented 0.525% of BW daily with DDG for the entire grazing period (84 to 156 days). Daily gains were increased 0.55 lb/day for the entire grazing season. Performance from the last two years of data show a quadratic decrease in ADG as grazing days increase and forage quality decreases for both the supplemented and nonsupplemented cattle. The response to DDG supplementation increases with increasing grazing days.