I have a young flock of 20 layers that started laying last July / August. The Chickens are now 15 months old. I was getting around 13 - 18 a day last summer / fall and then this winter got 7 - 9 a day. My egg production was going back up to about 12 - 14 a day and in the past month has dropped to 6 - 8 a day. They have access clean water and all The Layer food they would like. I also have a feeder for Grit and Oyster Shell. They look and act the same as normal and don't seem to have any diseases that I can tell from their appearance of from their droppings. The only thing I had noticed that was different from this year to last was the actions of a Male Duck I had with them. This spring he was picking on them and even trying to mate with a few. He didn't act this way last year or during the winter. I just got rid of him thinking that this may be the cause of my egg prodution decrease but have no way of knowing if he is the cause Any input or advice for me to look into? The flock has not molted yet. I am located in Central Illinois.