Table 5.

Effect of increased inclusion of a Saccharomyces cerevisiae fermentation product (SCFP) on newly weaned beef steer behavior and ear surface temperature during the Mannheimia haemolytica vaccination period¹

	Treatment2			SEM	P-value
	CON	SCFP14	SCFP28		CON vs. SCFP14	SCFP14 vs. SCFP28	Day	Trt × Day
DMI, kg/d	10.0	10.5	9.6	0.26	0.15	0.02	0.08	0.99
Active, min/d	79	77	81	1.8	0.41	0.11	<0.01	0.02
Ruminating, min/d	596	612	607	9.2	0.23	0.69	<0.01	<0.01
Min/kg DM3	62	57	64	1.9	0.07	0.01	<0.01	0.95
Min/kg NDF3	160	150	165	4.9	0.05	0.01	<0.01	0.95
Min/kg peNDF3,4	612	565	633	18.8	0.07	0.01	<0.01	0.95
Average Temp, °C3	24.8	24.5	24.5	0.13	0.03	0.99	<0.01	0.08

¹Vaccination given on d 34. Average DMI, activity, rumination, and temperature from 1 wk prior to vaccination used as a covariate in analysis.

²CON = 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.

³Natural log transformed; back-transformed means and SEM presented.

⁴peNDF = physically effective NDF.