Fig. 2

Methionine-rescue improved growth performance, feather formation and feather follicle development. A Growth performance of broiler chickens in the post-trial period (n = 6). B Methionine and SAM concentration in skin tissue and serum of broiler chickens with methionine-rescue (n = 12). C and D Feather weight (C) and feather length (D) of broiler chickens with methionine-rescue (n = 12). E Feather follicle development of broiler chickens with methionine-rescue (n = 6). Scale bar at 200 μm. Control, Control group; Met-deficiency, Methionine deficiency group; Met-rescue, Methionine supplement group; BW, Body weight; ADG, Average daily gain; ADFI, Average daily feed intake; F/G, Feed to gain ratio; Met, Methionine; SAM, S-Adenosylmethionine