Objective of the Study The objective of present study is to evaluate the feeding values of commercial loads of three SBMs originated from the U. S., South America, and India in broilers by chemical (in vitro) and in vivo assays, and feeding trials. Chemical and in vitro measurement will include proximate and amino acid compositions, urease activity, and protein solubility tests. Feeding trials will include a lab scale feeding trial (in vivo assay) to compare protein quality, and a test-farm scale feeding trial to compare economic feasibility in broilers.