Here is a great site on animal feeds.
"Feedipedia is an open access information system on animal feed resources that provides information on nature, occurrence, chemical composition, nutritional value and safe use of nearly 1400 worldwide livestock feeds. It is managed jointly by INRA, CIRAD, AFZ and FAO.
The main objective of Feedipedia is to provide extension and development workers, planners, project formulators, livestock farmers, science managers, policy makers, students and researchers with the latest scientific information to help them identify, characterize and properly use feed resources to sustainably develop the livestock sector.
This is particularly important in emerging and developing countries where feed resources available locally are often under-utilized due to lack of information. Providing global knowledge on feed resources, including unconventional and lesser known ones, contributes to the development and use of innovative and appropriate feeding options and strategies."