Coturnix here, have been getting an egg a day(4) for past 3 months. Recently I put straw into the "laying box". Since then I get 1-2 a day. Nothing else changed, food, sandbox, water etc the same. Maybe less sunlight since fall is kicking in. Would straw do it? or the temps dropping, sunglight? Night time its 13C Day around 20C. No idea what to do next. Plan for winter is to put them into garage, and shine an led bulb into the cage with a timer set for 12-14 hours.