I am so sorry.I thought that she had been injured by a rooster but that was not the case. Her coop mates were injured but not the silkie. My best guess is that she ate something out free ranging that was to toxic for her. I've pulled every nightshade plant I can find and destroyed them where no chicken could get to them. She may have eaten to many tomato leaves. But most of the chickens eat tomatoes and leaves when they get into the area where the tomatoes are without a problem. I found 2 of the small Cornish pullets late today that are underweight like the silkie was when I found her. All the others are lively and full of vinegar. She is terribly missed as she always let me pick her up and hug on her like a puppy.