I live in Montana and our daylight is dwindling. I put a light with a timer to come on at 6 am and give them a couple extra hours, but they are going to bed 2 hours before sunset, so it really didn't make a difference. Should I have it come on at night too? Also, its been pretty cold. -5F for a few days now, as our low. They are ready and waiting to come out of the coop in the morning, though and stay mostly outside all day. Could there be something aside from the light giving them lower energy?