what do you guys do to winterize or should i say heat up the coops. I rent an farm space and theres no electricity and im worrying about my American game chicks that would be about 3 and a half month when the 30's and forties arrive? does anyone like insulate the coops or have sometype of home made heating device? any solar devices? Or will they be ok when it hits the 20's and even the zero temps?