The main function of ground maize in livestock feed is for

Ground maize, also known as cornmeal, is a common ingredient in livestock feed. Its main function is to provide energy to the animals. Maize contains high levels of carbohydrates, which are easily digestible and can be converted into energy by the animal's body. This energy is necessary for the animal to carry out its normal activities, including growth, reproduction, and movement. While maize does contain some protein, it is not a significant source of building blocks for the animal's body. Other feed ingredients, such as soybean meal or alfalfa, are typically added to provide the necessary proteins for body building. Ground maize also helps to add bulk to the feed, making it more filling and providing the animal with a sense of satiety.