I have had my chicks in our puppy whelping room for over a week now. Its time to put them in a bigger pen + I need the room.. The temp has been 80+ there whole lives. with gas heat & a red 250 watt. red heat lamp. where I need to move them the tempatures should be around 70 . But with the heat lamp it should be warm under that , RIGHT?? how cold would be TO cold for 11 day olds? There is NO drafts at all in the whelping room, But in the coop there might be s little but not much. can I do this move safely?