Table 4.

The effect of intra-mammary LPS or saline (CTR) challenge at 7 days postpartum in Holstein cows on dry matter intake, milk production, and energy balance.

Item	Group		SEM	P-value
	CTR	LPS		Group	Group × time
DMI, day 7 to 14
kg/day	18.5	15.9	1.5	0.18	0.47
% of body weight	2.67	2.20	0.26	0.16	0.61
Milk (kg/day), day 7 to 14	36.4	35.1	3.5	0.77	0.77
Energy balance, weeks 1 and 2
Mcal/day	−6.5	−9.1	2.6	0.46	0.48
% of requirements	82.3	74.4	6.7	0.37	0.19

SEM, standard error of means.

Time effect was significant (P < 0.05) for all items except milk production (P = 0.55).