I'm located in CT. Near the intersection of Litchfield, Hartford and New Haven county. We have 7 leghorns.They're about 3 1/2weeks old. I could use tips and tricks of the trade (so to speak). Will I need to heat the coop in winter? They are outside full time. We heat the coop now and block off the ramp at night so that they have to stay inside. We open the top back vent a little and so far so good. We're newbies to raising chickens, but we go thru so many eggs we figured this would be the best option for us. Help is appreciated! Thanks!