Table 8. Effect of feeding Se-biofortified hay in a 9-week preconditioning period on number of nasal microbiota genera.

	Bacterial Genera (number)*
Time Period	Control	High Se	SEM	P value
	(n = 15)	(n = 15)
Week 0 (Weaning)	153b	145b	8	0.46
Week 9 (End of Se Treatment)	167b	215a	9	<0.0001
Week 12 (Feedlot)	220a	227a	5	0.24

*Results are presented as least-squared means and pooled standard errors of the mean. LSMeans with different superscripts (a,b) differ across treatment and time (0, 9, and 12 weeks) at P < 0.01