I figure if my Boa had IBD he would've died by now and probably my whole collection would've been wiped out. But I will ship the Beardie separate, especially because he needs it to be just a bit toastier. I'll consult the breeder who sold him to me for how to properly ship him. As for the others I think I will give them their own compartments separate of each other within the box separated by styrofoam and each with their own heat packs. They won't come in contact with each other that way.