OK so I am a new chicken owner and have done tons if research. But still have so many questions. I have a beautiful flock of 12 girls and live in Massachusetts. Its getting cold and there is a window in the coop. Do I close it or leave it open? When the eggs are cold at night does that mean I need to refrigerate them now? I usually get the eggs at 4 PM as most are done laying at that time. Do I go multiple times. Will the eggs be good? Do I buy a heater to keep the eggs and chickens warm? Sorry for rambling...