First-year chicken keeper here. I have three 13-month-old hens, two Sapphire Gems and one Lavender Orpington. Since they starting laying last fall, they've averaged 3 eggs/day, sometimes 2. In the past month, I switched their food from 18% to 16% protein, and to crumble (I don't know what the old one was called, but you could see the grains and seeds in it). Now they appear to have lost weight, and are laying 1-2 eggs/day, and twice in the last week, 0. It could be that they're getting ready to molt, but I don't see any signs of that, or maybe just don't know what to look for. There aren't feathers all over the place, and no one is going bald. Just wondering if I should switch back to their other feed, or if something else could be wrong.