take the heat pack. its so the eggs dont freeze in these really cold temps were having. its very easy for the eggs to freeze in a very little time. and with the other suggestion about the heat pack incubating the eggs, the chances of that happening are very slim. go for the heat pack!!Do you guys think it's necessary to put a heat pack in with shipped hatching eggs? Anyone have experience with receiving shipped eggs in winter, particular in the northern and colder states or you guys up in canada? I was offered a heat pack with my egg shipment. Not sure if it's necessary or if it's indeed worth it. Mine, in particular, are only being shipped from Ohio to Pennsylvania.