Ok so I have several trios of 8 wk, assil chicks to ship this week (only if weather permits). My questions are I live in South Florida normally the warmest spot on the map. It is normally colder where they are going? I was afraid to use a hand warmer thinking maybe it would be to hot while they are still down here? I can put and extra chick to keep things cozy but dont want to over crowd either. Also what should my cut off temps be at the arriving city before calling it of. Also any tips on what to write on the box so the PO (who normally does a great job does not forget them on the outside stoop. Thank you in advance for shearing your hard won experience.