I just received 8 new baby chicks today. 6 weeks ago I got 7 chicks. Well, I only have one heat light and it has been mostly on over the 6 week olds. At 6 week it's safe to take the heat lamp away right? The reason I ask is because I want to use my lamp for the new chicks and I don't want to have to go out and buy a second light. The chicks are in the garage so it's protected from wind and rain and it's a little warmer than the outside.