I am new to having chickens; we started our flock last Spring. We love it! We are worried about the chickens (6) now that the weather is colder and we have 4 inches of snow from last night. Do we place a heat lamp in their coop or not? do we let them free range when there is snow on the ground? Will the chickens become cold? We are thinking of moving hte coop into the garage! Thanks for all the information.