What's up here? I've checked and preventatively treated for mites and lice havent found any

the one missing the most feathers is blanch and her skin isn't irritated at all. the sides of my roosters neck are bald in patches and all their feathers look rough. I'm thinking molt as they are about the age for it ( a year old now ) and their egg production has greatly decreased, along with me learning constant light is bad for them, now I keep them on for roughly 13-16 hours a day and turn them off at night.