This is our first Winter with Chickens. We are going to put the heat lamp out in the coop, and the coop has good ventilation up by the roof to let some fresh air in but not rain or snow. Were are thinking of insulating it too if need be. ...Is that still necessary with the heat lamp?? The coop is 4ft x 6ft. Were hoping the heat lamp prevents the water from freezing too, but if not we will purchase a electric water heater base.