I have 5 chicks in a brooder in a spare room. There are 2- 4 week old easter eggers, 1- 6 week old sizzle and 2- 3 week old silkies. I was concerned about putting the various ages together but the seem to get along fine. All seem healthy with good appetites and lots of activity. My dilemma is that I will be having house guests and I need to move the chicks out of that room. My options are to move them into the garage or create a brooder area in the coop. If I move them to the coop, I'm not sure what to do about heat as there is no electricty out there. Are there alternatives to a heat lamp that may work? How much heat do I need for these babies? I live in CA and it is in the 38-41 degrees at night. Any advice is appreciated!