I have been having a problem with only one of my girls losing feathers. She is only losing them on her neck, about a 1 inch square on both sides. At first I thought it might be mites so I dusted both of my chickens with DE and did a thorough cleaning of EVERYTHING! I have checked under her wings and around her vent many times and I don't seem to be seeing signs of mites, but she is continuing to lose her feathers! I have two chickens and she is the only one losing them, she seems to be happy and healthy other than the feather loss. I have also been watching to see if the other chicken is picking on her but I haven't seen any kind of aggression between them. She is about 8 months old and laying everyday. Does anyone have an idea as to what's going on? And help would be greatly appreciated!!!! I'll post a picture of my poor Vera girl below!