I just called McMurry to let them know our low on the pick up day changed to 18 degrees for the low and I wanted to make sure the were adding males for heat and the lady put me on hold and then came back and said they will add a heat pack. She said it is an option and costs more they I asked her how much and she said nothing for me because of the cicustance of it being a re order. This puts my mind at ease. If anyone else has a re ship or just wants to pay to have the heat pack to be safe, call them I would have done ths on the first ship if I knew they would but I asked and they told me they didnt do it.