Figure 1. Chicken body weight and growth performance with in ovo injection of betaine and subsequent 7 days of CORT challenge.

(A) Chicken body weight; (B) Average daily feed intake; (C) Average daily gain; (D) Final body weight during 7 days of CORT treatment. C = Control; B = Betaine; CON = vehicle; CORT = Corticosterone; Values are means ± SEM, ^*P < 0.05 VS Betaine group, means without a common letter differ, P < 0.05 (n = 8).