The post office (usps) may not be telling you that express shipping does NOT mean next day arrival for any live animals. Live animals are exempt from the 'next day delivery guarantee'. My post master told me that since animals can not be placed in cargo holds of planes, they are sent by over the road freight (in trucks). So it very well can take three days for a bird or birds to be in the system before being delivered. I did speak to someone else with the postal service and they said that birds (and any live animals) can not be placed in the cargo hold of planes (due to lack of ox, warmth, etc) but that they are put up in the area the pilot and crew set - passenger area. But that even if sent via plane, live animals can take up to three days to arrive at their destination. So I do not know which of those two stories is correct, about if shipped over ground via truck or by plane. But the fact is: they are not guaranteed next day delivery and in fact can take up three days to be delivered. Review of the facts: express is guaranteed arrival the next day, **except** for live animals. They (the usps) does not and can not guarantee any live animals will arrive the next day, nor do they guarantee the animals will arrive alive. I also found out that it is not at all UNcommon for the animals to take three days and to arrive sick or dead.