Table 3. Effect of grain vinegar feeding on milk composition, and blood metabolites

	Control1)	Vinegar	SEM	p-value
Milk
Production (kg/day)	27.3	26.7	0.300	0.057
4% fat corrected milk (kg/day)	28.7	28.3	0.270	0.130
Fat (%)	4.48	4.50	0.041	0.636
Protein (%)	3.49	3.50	0.017	0.678
Lactose (%)	4.49	4.47	0.009	0.008
Solid not fat (%)	8.98	8.96	0.018	0.301
Urea nitrogen (mgN/dL)	10.6	10.0	0.229	0.012
NEL (Mcal/kg milk)	1.06	1.07	0.004	0.637
Blood metabolites
Non-esterified fatty acid (μEq/L)	51.04	47.75	4.26	0.412
Blood urea nitrogen (mgN/dL)	11.44	11.21	0.48	0.693

Control, no treatment; Vinegar; 2 L of 4.5% acetic acid equivalent per day.