I guess everyone missed the post where someone said you can NOT ship live adult birds legally any way other than EXPRESS.
Oh yea, and they were correct.
9.3.4 Adult Fowl
[4-12-07] Disease-free adult fowl may be mailed domestically when shipped under applicable law in accordance with 1.7. Adult chickens, turkeys, guinea fowl, doves, pigeons, pheasants, partridges, and quail as well as ducks, geese, and swans are mailable as follows:
a. The mailer must send adult fowl by Express Mail in secure containers approved by the manager of Mailing Standards (see 601.8.0 for address).
b. The number of birds per parcel must follow the container manufacturer limits and each bird must weigh more than 6 ounces.
c. Indemnity may be paid only for loss, damage, or rifling, and not for death of the birds in transit if there is no visible damage to the mailing container.