Ok, put their heat lamp up over their roost, changing out all the shavings and adding all fresh and fresh straw on top of that, as well. Will close off some of the vents as well. Hopefully that will be good. I just don't want them to freeze overnight tonight, as it is really going to be alot worse then it has ever been here (heck, I cannot remember it ever being as cold as -20F here, esp. the actual temp not counting the wind chill!) I used their red brooder light.