My chickens have been steadily laying one egg a day for the last year when i got them from my cousin They are a few years old. Then about two months ago they all stopped. All of them. One kept on a bit after the others but then she stopped too. Their diet is the same, their run is unchanged. The only changes are cooler temps but not drastically i live in southern california and a maturing rooster. Could the too who is now 5 months old have effected them? They all get along fine. No fighting and he hasn't started attempting to breed or anything yet. What else could it be? Thanks!!