Shipped eggs don't have to go by USPS. I got my Sweetgrass start from eggs from Porter. I had them shipped by FedEx and requested they be shipped ground. In order to keep the eggs from being jostled too badly I also had them held at FedEx and picked them up there.porter's is really the place to get them. I think turkey eggs don't travel in the mail very well, although I haven't tested that theory myself, I do know that the eggs can be very temperamental and a lot of people have trouble hatching them. I took a few years to really dial in turkey parameters on my old incubators so they hatch well for me, but I am not sure it is worth shipping their eggs. Poults are your best bet on starting. I only have one recessive slate hen, so she of course hid her nest somewhere out in the pasture and freaked me out for a month, but I am probably going to band all her poults since they will carry recessive slate, or be recessive slate. For as huge as the recessive slate line is, the toms aren't the bosses, I am pretty sure that the tiger bronze and a blue sweetgrass are the current boss toms.
If they get shipped by air in a cargo plane which has a non-pressurized cargo bay, it can destroy all of the eggs.