Today when we where letting the chicken out I noticed that one of them was still sitting on the roost. When I picked her up she didn't struggle which is weird for her. And when I sat down with her she didn't want to move in fact she almost feel asleep, she didn't want to go and peck the grass, and she went to bed at 7:00 (before the sun went down). also when I was looking at her I noticed that her comb looked faded or pale and she had diarrhea. Does anyone know what's wrong with her?