Table 2.

Effect of increased inclusions of a Saccharomyces cerevisiae fermentation product (SCFP) on performance and health of newly weaned beef steers

	Treatment1			SEM	P-value
	CON n = 12 steers	SCFP14 n = 12 steers	SCFP28 n = 12 steers		CON vs. SCFP14	SCFP14 vs. SCFP28
Initial body weight, kg	322	324	322	3.5	0.62	0.65
Final body weight, kg	428	430	419	5.9	0.80	0.20
Dry matter intake, kg/d
Days 0 to 28	8.8	8.7	8.1	0.36	0.90	0.25
Days 28 to 56	10.4	10.5	10.1	0.41	0.78	0.46
Days 0 to 56	9.6	9.6	9.1	0.35	0.92	0.30
Average daily gain, kg/d
Days 0 to 28	2.19	1.94	1.96	0.116	0.14	0.88
Days 28 to 56	1.60	1.84	1.50	0.116	0.16	0.05
Days 0 to 56	1.89	1.89	1.73	0.082	0.96	0.19
Gain:Feed
Days 0 to 28	0.256	0.221	0.244	0.014	0.10	0.28
Days 28 to 56	0.154	0.176	0.152	0.013	0.23	0.18
Days 0 to 56	0.200	0.197	0.193	0.010	0.81	0.79
Treated2, %	16.7	8.3	25.0	–	0.57	0.33

¹CON = Original XPC (Diamond V, Cedar Rapids, IA) at 0 g·steer⁻¹·d⁻¹; SCFP14 = Original XPC at 14 g·steer⁻¹·d⁻¹; SCFP28 = Original XPC at 28 g·steer⁻¹·d⁻¹.

²Percentage of steers treated for respiratory illness.