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...

The feeds and fodders for livestock are classified as roughages and concentrates, dry and fresh, as well as conventional and unconventional. Crop residues are the single largest bulk feed material available at the doorsteps of the farmers for feeding livestock, specifically, the ruminants. Antinutritional factors present in the agro-byproducts or unconventional feeds can interfere with the feed utilization, reduce production or affects the health of the animal. Various agro-byproducts, unconventional products such as molasses, silkworm pupae, distillery waste, wastes and byproducts from meat,...