Table 8.

Percentage of pigs requiring AB injectable treatment per batch within each weaning age from weaning to marketing¹

	Batch allotment order					Probability, P-value<
Item, %	First	Second	Third	Fourth	SEM	Linear	Quadratic
18.5 d	34.1	30.2	36.3	38.5	3.57	0.251	0.398
21.5 d	14.3	26.4	37.9	39.6	3.63	<0.001	0.057
24.5 d	16.5	12.6	19.2	23.6	3.15	0.096	0.609

¹A total of 2,184 pigs (DNA 600, Columbus, NE × PIC L42, Hendersonville, TN) weaned at three different ages allotted in a wean-to-finish facility following a sequence of four batches of 546 pigs each. There were 26 pigs per pen (50% barrows and 50% gilts) and 28 replications per age. Each batch was placed in the facility with an interval of 8 d.