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One winter and one summer trial were conducted comparing dry rolled corn (DRC) to DRC + corn gluten feed (CGF) finishing diets. No performance differences among winter study treatment groups were found. In the 106- day summer trial, DRC or CGF (40 percent DM)-based diets were fed as high-energy, 8 percent roughage diets either ad libitum (HE), restricted to approximately 90 percent of HE (RE) or fed as moderate energy, 20 percent roughage diets (HR). Feeding CGF diets or lowering metabolizable energy (ME) intake through RE or HR diet regimes did not improve feed to gain ratios or appear to reduce effects of heat load. However, only a limited number of high heat load days occurred.