I have a flock of golden laced wyandotte chickens that are losing their feathers. I have given them vitamin water, apple cider vinegar and changed their feed and still no change. I have another chicken in the same pen and she hasnt lost any feathers. Could she be the culprit? I have checked to see if i could see lice or mites and no sign of that. The hens are losing feathers on their backs and bottoms and the rooster is too and he's also losing feathers from his chest. Here are some pics to show what i mean. As you can see he has no feathers on his chest when he should have the usual golden laced feathers. All he has is fluff. She is completely pink skined and featherless on her back and under parts. This hen is all Fluff like the rooster and bare underneath. As you can see they dont even hardly resemble golden laced chickens bc of the feather loss. What could be going on?!!