Heat packs are included at the discretion of Papa's Poultry regardless of wether or not they have been ordered.  However, if you would like to ensure that your chicks are sent with a heat pack or a couple of heat packs, you are welcome to purchase them for $4 each which covers the cost of the heat pack and the additional postage due to increased weight of the box. I can include up to 4 heat packs in a chick box.  for a full layered heat floor.  I do recommend multiple heat packs whenever your temperature lows are lower than 32 degrees.  I also recommend heat packs on any order of fewer than 10 chicks.