She been molting for 6 months I accidentally triggered a stress molt in 2 hens moving them around 2 coops 1 hen recovered normally. But one is growing feathers back at a extremely slow rate . She also seems to still laying eggs. I have feeding her kalmbach feathers fixer for the last 4 months it has %20 protein. I sure it's not lice or mites . She is fully healthy otherwise.