I live in central Texas and it will be the middle of winter when my chicks are old enough to go out to their coop. What do I do? I know that our winters here are not that bad but it wont be 70 degrees outside either. Do I heat the coop with a heat lamp( a heat lamp in a wooden structure filled with straw scares the crap out of me!!!) or try and keep chickens in the house till it is warm outside????