The global scenario of the livestock industry has seen tremendous growth. With growth the increased requirement for feed and usage of unconventional feeds to improve production with proper additives has also increased. In the face of antibiotic resistance and hormone residual scare, feed industry has now moved to more and more use of non- antibiotic growth promoters with emphasis on enzymes and their application in animal feeds to improve utilization and production.The use of enzymes as a feed additive has rapidly expanded. The economic and social benefits of enzymes have been well...