Hi Hoping someone can help out there. I noticed that one of my hens has lost some feathers around her eye and what was part of the red comb is now all grey. I don't see any other symptoms. She is not sneezing, not unsteady on her feet and seems to be eating like normal? It is winter here so she is not laying at the moment. It doesn't seem to have spread to the other chickens in the flock. I have put in a picture of one of the healthy chickens for comparison. I am not sure what it is or what treatment to apply. Any help would be appreciated. Thanks, Jessica Will try and add a picture.