I'm getting ready to move my 7-8 week old chickens out of a room in my house and into the garage and am wondering if I need to have supplemental heat. The garage is built into a hill so stays cool and is currently 62 degrees. I plan to keep the chicks in the garage for 2-3 more weeks until they get a little bigger then begin to introduce them to my current flock. I asked the breeder I got the chicks from about it and she suggested continuing to add a little extra heat (even a low watt light bulb) to keep the temp in the mid-60's for a while longer. They are all fully feathered now and it's 70 degrees in the house where they are. I'm thinking they will be ok but would feel better hearing what others have to say. Thanks!