Hi all. I'm new here and have a question. I'm reading other threads that say to keep chicks in a brooder first week at 95 degrees and decrease temp by 5 degrees per week until brooder temp reaches outside night time temp. Well even if I turn the heat light off completely, the temp in the house is about 70 degrees. So how do I go from 70 degrees to outside temps of 40? Do I have to get some type of heat source for the coop? Thanks