I hadn't used supplemental heat in previous years, but with our first below zero cold snap this year my rooster and several hens suffered frostbite. I added two red light heat lamps, like I used when they were chicks. Unfortunately, this seems to have them confused. I thought the red lamps would only provide heat, not light for them, but they aren't roosting at night, just wandering around the coop and eating. Some of them haven't gone in the coop at night and have wandered around the yard in the dark, confused. I have to gather them up and haul them into the coop. When it is warmer (above 15 degrees at night), I haven't used the heat lamps and that seems to fix the problem. Am I using the wrong kind of lights? Is there a better way to add heat? I'm planning on limiting my chicken numbers in future years as I'm certain that having 15 this year (not my usual 10 or so) and the increased moisture is a big part of the problem. However, I need to get through this winter.