Cross-bred yearling steers were used in a feeding trial to compare the use of two different direct fed microbials (DFM), ProTernative CF (DFM-CF) and ProTernative SF (DFM-SF). The treatment design was a 2x2 factorial with a control (no DFM), DFM-CF, DFM-SF, and both (CF+SF). Diets consisted of 40% WCGF with high moisture corn with no feed additives other than the DFM treatments. No differences were observed in feedlot performance or carcass characteristics