Animal Welfare Act and Regulations
USDA Animal Welfare Information Center website discusses the regulations that deal with farm animal welfare
Animal Welfare Information Center, USDA National Ag Library
Provides information for improved animal care and use in research, teaching, and testing.
Pork Quality Assurance Plus Certification - PQA, National Pork Board
Certification program which aim is to support pig farmers and their employess in executing good produciton practices, including pig handling and welfare.