I have a 15 month old Polish chicken, who was laying eggs regularly. She went broody, no eggs. Her last egg was end of July then she went into a light molt in September. Hasn't laid any eggs since July still. I've been checking all of them and there's no sign of mites or anything. She didn't lose a lot of feathers and from what I can see all have come back. I up her protein as well. I'm in located outside of Chicago area. My new girls are still laying and haven't molted they're about 6 months old.Is this normal?