California White hen, about 2 ys old, daily layer..she was fine day-before-yesterday..didn't check on them yesterday. She's breathing from her mouth, hanging by herself even when they are free ranging, tail is down and her comb and wattles are a dark, dried-blood color, almost a brownish-purple. She's also usually pretty skittish and lets me get a lot closer than normal, unless I try to touch her. Please, any ideas?