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Finishing diets containing wet corn gluten feed were fed to 128 yearling steers to evaluate inclusion of lime filtrate as the source of supplemental calcium. Lime filtrate supplied 0, 50, 100 and 150% of the base calcium level of .70%, with limestone supplying the remainder. While dry matter intake was reduced for the 100% level of calcium from lime filtrate (P<.10), average daily gain and feed efficiency were not different from the limestone control. The 150% level of calcium from lime filtrate did reduce average daily gain and feed efficiency (P<.10).