I live in Illinois and for the past month it has been anywhere from below zero to 30 degrees. Since it was so cold I added a lamp with a red light bulb to the duck house. The light bulb doesn't give off too much heat, but it prevents the hay and poop from freezing. About 2 weeks after doing this they started to lay eggs for the first time. Could the heat lamp be messing with their cycle? Im worried if it is harming them by using it, but I'm also worried they will get frostbitten if I dont use it? Advice please!!