Stress and immunological response of heifers divergently ranked for residual feed intake following an adrenocorticotropic hormone challenge

Table 2 Effect of residual feed intake (RFI) ranking on feed intake, efficiency and animal performance in beef heifers

	High RFI	Low RFI	SEM	P-value
Number of Animals	12	12	–	–
Residual feed intake, kg/d	0.34	−0.48	0.037	0.001
Feed conversion ratio, kg DM/kg gain	8.13	6.19	0.834	0.03
DMI, kg/d	5.92	4.98	0.127	0.001
Mid-test metabolic BW, kg^0.75	75	77	1.6	0.27
ADG, kg/d	0.71	0.76	0.028	0.92
Final BW, kg	340	355	9.8	0.21

ISSN: 2049-1891