A commercial trial was conducted to compare feeding 20% alkaline treated corn stalks (TRT) in place of 14% dry-rolled corn and 6% native stalks (CON). Both diets contained dry-rolled corn (40 or 54%), 35% wet distillers grains plus solubles, and 5.17% supplement. Alkaline treatment was performed by adding 5% calcium oxide to 95% ground corn stalks (DM basis) and water to equal 50% DM. Cattle fed TRT had lower ADG and poorer F:G with equal DMI. The changes in gain were due to lower live and carcass weights. Carcass quality was impacted subtly, and reflects the lower gain with equal days fed between the two treatments