My chickens seem to be happy and healthy. They are 1 1/2 years old now. I have 8 - a mix of breeds. Orpingtons, Wyandottes, Bramahs, R.I. Reds .... I write on my calendar how many eggs I collect each day. All summer long, it's been 6-7, and sometimes even 8 eggs per day. Then almost exactly 2 weeks ago, I got 5, then 4, then 5. It waivered a little for a few days. Last week it went down to 3 or 4. The last two days it was 2. Today I got 1 egg. I know egg production decreases with photoperiod. I've been through one winter already with this flock. About a week ago I plugged in the timer again, which I ran all last winter, and set it for 2 extra hours of light in the morning before the sun comes up and 1 hour at night after it gets dark. However, this hasn't worked, as my eggs per day still decreased. How long should it take for the chickens to respond to longer "daylight"?