Buff Orpington hens haven't been laying for nearly three months now. What up? I've gone over everything I know to encourage production. Here's what I know: A: Molt start about three months ago. None of them ever lost all their feathers though. B: Change diet two months ago to cracked corn (only). C: 14 of the hens are 16 months old, 3 others are 9 months. D: Out of 17 Buff Orpingtons, I get 1-2 eggs a day. E: Have 10 Barred Rocks on same diet and I get 3-5 eggs daily. F: Live in Texas so the cold weather has only been present a few times. No ice, snow, or rain in excess in months (well watered). G: Have rats, but no evidence of broken eggs anywhere. Hopefully, someone can help.