I collected eggs at 7 am and it was, maybe, 35 degrees out. The coop seemed warm enough, but my nesting boxes stick out the side of the coop and the eggs seemed really cold (yes, eggs plural! I must have two layers now, yeah!) Since I know it is only going to get colder here in Mass, should I do something to heat the nesting boxes? If eggs sit out for a few hours at sub-zero temps is it going to be bad for them? For eating, obviously, not hatching!