One of my hens has been missing feathers under her chin for quite some time. I posted about this awhile ago but I had not included pics. I looked on her many times and can't find anything that would look like mites to me.
Here she is-
The feathers just don't grow nor does she lose anymore at all. This has been like this like this since I got her about 3 months ago.
Here she is-

The feathers just don't grow nor does she lose anymore at all. This has been like this like this since I got her about 3 months ago.