I just got a pair of wood ducks and it is going to get at least ten below in the very near future. All I got on them is a 60 watt bulb and they are in a 4'x4' building. Will they be ok? Also the female got in her water dish a got her tail feathers covered with globs of ice. What do about that? And then I have one more qeustion. Is 16% layer and scratch and grain ok for them?