To me it looks like that one is about to bust out in tears.
I offered up my poults a few salmon trimmings. It's so funny to offer them something new. One will taste, and the immediate reaction was "yuck", accompanied by a hasty retreat, head shaking, and beak wiping on the pellet bedding. The second one said "hey, wow that looks exciting" and came over to check it out. Another nibble, quick backstep, head shaking routine. Third one got brave and grabbed a piece and ran. #1 and #2 chased after, and #3 gulped it down to avoid losing his scrap of salmon. #1 and #2 came back and each grabbed a piece, and #3 chased them around while they gulped it down. #4 just sat back and watched, then walked up to my hand and sat down on top of the remaining scraps. So I now have a salmon scented poult...