Table 1.

Actual diet formulations and nutrient composition of diets fed^a,b,c,d

	Dietary treatment
	Days 1–7		Days 8–21		Days 22–77
Item	CON	DFM	CON	DFM	CON	DFM
Corn silage, %	38.07	38.07	37.28	37.28	60.14	60.14
Dry-rolled corn, %	17.22	17.22	19.88	19.88	15.63	15.63
Dried distillers grains plus solubles, %	14.66	14.66	14.88	14.88	15.73	15.75
Pelleted supplement, %e	5.88	5.88	6.10	6.10	6.40	6.40
Pelleted treatment supplement, %f	4.13	4.13	2.29	2.28	2.10	2.08
Grass hay, %	20.04	20.04	19.58	19.57	—	—
Nutrient composition
DM, %	54.32	54.33	52.65	52.66	43.42	43.42
CP, %	12.43	12.40	12.74	12.73	12.39	12.39
NDF, %	37.75	37.75	36.50	36.50	32.64	32.64
ADF, %	28.14	28.14	27.11	27.11	18.74	18.73
Ash, %	6.72	6.72	6.05	6.05	5.84	5.84
EE, %	3.90	3.90	4.00	4.00	3.88	3.88
NEm, Mcal/kg	1.78	1.78	1.79	1.79	1.84	1.84
NEg, Mcal/kg	1.12	1.12	1.13	1.13	1.21	1.21

^aTreatments included: no DFM contained in the diet (CON) and a diet that contained the experimental Saccharomyces cerevisiae DFM (Levucell SC, CNCM l-1077, Advantage Titan at 10 g/steer/d providing 8 × 10⁹ CFU, Lallemand Animal Nutrition; DFM).

^bAll values except DM on DM basis.

^cMean values based upon weekly ingredient assays and daily feed batching records.

^dDietary NE values based upon tabular feed values and true ingredient inclusion levels.

^eContained (as-is basis) per 907 kg: 613 kg of soybean meal, 91 kg of soybean hulls, 43 kg of trace-mineralized salt, 157 kg of calcium carbonate, 1,972 g of Rumensin-90 (Elanco, Indianapolis, IN), 48 g of vitamin A (650,000 IU/g), 750 g of vitamin E (500 IU/g), 721 g of intellibond Zn (Micronutrients, Indianapolis, IN), and 195 g intellibond Cu (Micronutients). Pellet averaged 89% DM.

^fContained (as-is basis) per 907 kg: 907 kg of soybean hulls (CON) or 847.7 kg of soybean hulls and 59.3 kg of Levucell SC, CNCM l-1077, Advantage Titan (Lot number: LA080820180220B; Lallemand Animal Nutrition) with a label guarantee of 8 × 10⁸ CFU/g and an assayed value of 12.9 × 10⁸ CFU/g (Levucell). Both pellets were 89% DM. Pellet DM inclusion level was altered to ensure equal intake of the pelleted treatment supplement across differing levels of DMI.