An animal food (feed) ingredient is a component part, constituent, or any combination/mixture added to and comprising the animal food. Animal food ingredients might include grains, milling by-products, added vitamins, minerals, fats/oils, and other nutritional and energy sources. 

Proper nutrition gives your animals the vigor to grow, develop, and reproduce, and strong immunity to fight off infections. All these advantages lead to more profitable and sustainable agriculture. 

Two types of animal feeds are:

• Roughage: These are rich in fiber; e.g., cowpea, berseem, etc. They are coarse and fibrous substances having low nutrient content. ...

• Concentrates: These are nutrient-rich and low on fibers; e.g., oats, maize, etc. It is low in fibers but contains relatively high proteins and other nutrients.