I have one hen that I can't figure out if she is feather picking herself or if the ducks are doing it. Pretty much ruled out the other hens. I never find her feathers. Bare above the tail, under wings, shoulders. Currently wearing a hensaver. This started about 6 weeks ago. I think she is thinner despite a RAVENOUS appetite but she could just look that way because of less feathers. No signs of worms or external parasites. Good, large, formed poops. Lays beautiful eggs daily. I am finishing up my 2nd bag of Nutrena Country Feeds All Flock after feeding Dumor while my birds were growing (they are all 31 weeks). I am not sure if starting the new feed and her feather loss was a coincidence or not…. they were also locked up more due to weather, their run was winterized with plastic, and she started laying. ALL if my other hens are good weight, beautiful feathers, 2 are laying. I give them BOSS and mealworms daily (total of probably a cup between the 2 ducks and 5 hens). They get a handful of cracked corn at dusk. Some veggie scraps during the day if I have them (no more than a cup lately). Oyster shell is free choice. Flock block in run although they seem not too interested in it. Thinking of trying Purina Flock Raiser or Nutrena Feather Fixer….higher protein and other higher nutrients when I compared labels. Mostly thinking of switching to see if the additional/different nutrients help this hen out, or maybe give the ducks something additional in case they are the ones doing it. Thoughts?