The goal of supplementary feeding is not to bring nutrients but help the fish, phrones, physiology in some other way. However, if commercial feed, which seems to be nutritionally balanced can give a better average daily growth.
Adding enzymes to the animal feed enhances its nutritional value. They are formed from combination of many enzymes, the animal feed enzymes are well capacitated to degrade plant cell walls found in the grass feed of these pasture animals.
Modern feeds for poultry consists largely of grain, mineral supplements, and vitamin supplements. Healthy poultry require a sufficient amount of protein and carbohydrates, along with the necessary vitamins, minerals, and an adequate supply of water.