We just noticed Our previously very healthy 1+ year old chicken has lost a patch of feathers on her underside. Most of the exposed skin looks healthy except for one patch that is reddish, nothing oozing and skin is unbroken. We think she has lost some weight too. She seems normal otherwise...
We introduced 2 new chicks to our now 5 chicken flock last summer. One of them is definitely lowest on the pecking order but lived with the others in the same coop and run throughout our long MN winter with no problems. In the past 1-1.5 weeks we noticed she is missing most of the feathers...