I have two hens that are in the middle of a moult & the temperatures are supposed unusually cold for quite a few days (high is supposed to be 25 on Monday, lows nearing 20 degrees F). I am worried the moulter's are going to have a rough time, is there anything I can do? I am thinking of putting a light bulb in their henhouse but nervous about it causing a fire??? Any good ideas? Thanks!