Unfortunately, no. USPS does NOT guarantee overnight Express delivery for live animals, as much as we would like them to. We agree: it seems a little crazy that the MOST important packages aren't subject to the same guarantees that much less sensitive packages have... but that is their policy.
Even though the Post Office won't refund your postage, as a part of My Pet Chicken's 100% Live Arrival Guarantee, in addition to refunding the cost of lost chicks, we do cover shipping costs in some circumstances (out of our own pockets). Read details of our 100% Live Arrival Guarantee here and in the related questions below.