I live in KY as well and have three hens who aren't laying worth a hoot. Mine are 3 years old. I have a Black Australorp, who usually lays up a storm and she has already molted back in October, but hasn't laid in a month or so, an Americana, who hasn't molted at all and hasn't laid in over a year, and a little red one that I am not sure what she is, she is molting and isn't laying, she too last laid about a month ago.
We feed them Purina's Layena, a natural based feed that is 16% protein. We give them kitchen scraps such as lettuce, carrot peelings, apples, bread, etc.
They don't have any artificial lighting or heating but are allowed out from 7:30 am till dusk when they put themselves up and we lock their coop up. We haven't moved them and they are bedded down pretty much the same, a thick layer of shavings with hay added in the winter for warmth. They get fresh water daily and have access both in the coop and outside of it. No changes to flock either, though if they don't pick it up they are going to be sent to a retirement farm and replaced with girls that pull their weight.
Any suggestions?
Thanks in advance.