They are a year old and having some feather issues. It started with one chicken and slowly they have all had various bald patches with the worst being my Rhode Island reds. About half of them have bare butts, some feathers missing on their necks. Half of them seem unphased and have normal feathers. I do not see any visible mites or lice on them/in the coop. I do not have a rooster anymore. I ordered chick starter to mix in with their feed to up protein content thinking they may be in a molt but after further reading I’m concerned they have depluming mites. I have attached pictures if you are willing to give me any advice it would be really appreciated I am not sure where to go from here to help them/ if I should go a different route before I treat them all.
