This is all caused(slower metabolism) by a decreased amount of daylight and happens every year, be glad you even get any eggs as most don't unless they are artificially supplying the hens with certain amounts of light hours. Now is the natural time for hen to not lay eggs under normal circumstances. I have about 250-300 layers here I might be getting a dozen a day if I knew where they were all laying(the ones out and about) the penned ones, nothing-nada-zippo and I'm not pushing them either. I could boost up their intake of proteins but I'm not in any need or hurry to do so and not ready to hatch any anytime soon gonna just let them come into lay under normal conditions this year as I just want to hatch from the natural laying ones and no intervened ones. so to say.
Jeff