I hope this link works. Should answer all of your UDSA questions (o.k., maybe not all but it's pretty informative.
http://www.scribd.com/doc/1494103/USDA-Poultry-Slaughter-Exemption-0406
http://www.scribd.com/doc/1494103/USDA-Poultry-Slaughter-Exemption-0406