I just got 3 chicks today that are each around 3 weeks old. I got silver leghorn, cuckoo muran and an ameraucana . I put a red heat light above their enclosure. They are actually in an old metal washtub with chicken wire over it. How close should the heat be to the chicks at this age? I believe it's a 250 watt bulb. If it's pointed at a specific area I guess if they get too warm they can move right? The last chicks I got were last August and I didn't need to have a heat lamp on them at all. We are having unusually warm weather at the moment but they are threatening snow again later this week. They are in an enclosed patio.