It is really cold here this morning -13F the temperature is not the worst it is the wind that is cutting. It is that cold that if you start your car and turn it off the temperature difference from the inside of your engine and the outside temperature in some cases is causing the engine block to crack. That is cold my friend. I have pigeons sitting on eggs and these two squabs outside in an unheated uninsulated baby barn with 1/4 inch plywood between them and the elements. I wonder how many dead birds I have out there this morning.