Last year the USPS handled approximately
177 BILLION pieces of mail, each sorted through several of its 27,000 post offices. Statistics, as far as they are able to be garnered, suggest over 90% of those deliveries were intact. In a year's time (365 days), there is a 100% chance that I will drop and break a whole bucket of collected eggs at least once, delivering them from my henhouse to the kitchen. Why trash one of the cheapest, more reliable sources of delivery service? I am amazed that the postal service manages, with the sheer volume it moves, to deliver the majority of these exceptionally fragile packages in tact. We could hire a private delivery services. Except, then most of us would NEVER be able to afford to get eggs or chicks from the many locations throughout our country.
As to UPS or FedX, it is the same, as far as handling. (I don't know that either will knowingly accept eggs for shipment and to best of my knowledge, do not accept live animals.) Actually, the USPS subcontracts to one or both for some of its 'mail movement' so who knows who is not handling the fragile packages in an appropriate manner?
So pack your packages as best you can, better even. Send them priority or overnight with delivery confirmation. Remember, the farther you ship, the greater the chance of damage or loss. When shipping something as fragile as eggs, be prepared to deal with the situation if broken in shipment. MAYBE, be thankful, for a moment that the post office ACCEPTS eggs, live chicks, heck, even FULL GROWN birds ~~ making all this sharing between us possible ! Just think what would happen if the post office decided it would no longer accept them?
And, no, I do not work for the post office.
OK, rant over.