A feed additive is a food supplement for farm animals that cannot get enough nutrients from regular meals that the farmers provide and include vitamins, amino acids, fatty acids, and minerals.
In some cases, if an animal does not have some specific nutrition in its diet it may not grow properly. The nutritional values of animal feeds are influenced not only by their nutrient content but also by many other factors. These include feed presentation, hygiene, digestibility, and effect on intestinal health. Even with all of the benefits of higher quality feed, most of a farm animal's diet still consists of maize, wheat, and soybean meal because of the higher costs of quality feed
Types of feed additives in the European Union
A sensory additive an additive that stimulates the appetite, improving the voluntary intake of a diet. Examples include feed flavors or sweeteners.
A nutritional additive provides specific nutrients for an animal for optimal growth. Vitamin and amino acids fall into this category.
A zootechnical additive improves the nutritional value of a diet. It doesn't give nutrients directly to the animal but through its diet. This category includes, among others, enzymes and certain photogenic