I purchased 4 barred rocks 5 weeks ago. Currently this little family is located in large container in my garage in upstate NY. The temperature in my garage averages between 65 and 70 degrees and I do have a heat lamp above the container. The chicks are just about all feathered out but the temperature outside is in the low 30's in the morning. I don't wish to heat the outside coop and I'm in no hurry to move them out but I was wondering what would be safe temerature to make this move to the coop? thanks!!!