We have 7 hens, all 10 months old. 4 bared rocks and 3 easter eggers. We noticed a few moths ago that the most docile one was getting its down feathers under its vent plucked from a few of the bigger hens. We noticed that she was staying away from the flock more than normal lately. She also has been not eating as aggressively as the others. This morning she was very lethargic and one of her wings was stiff and riased slightly. She was standing very still. I told my family that she would need to be separated from the flock this evening if she wasnt acting better by the afternoon. This afternoon, she was dead at the bottom of the coop stairs. The others all seem to be eating and acting normally. We are rather new raising chickens and never had this happen before. We last one hen 6 months ago to a hawk. We have been getting 5-6 eggs a day and they all seem happy and healthy until today.