Broad categories of livestock feed stuffs?

1. Forages and roughages: grasses, legumes, hay, silage, and pasture
2. Concentrates: grains, oilseeds, and by-products such as bran, distillers grains, and molasses
3. Protein supplements: soybean meal, cottonseed meal, fish meal, and other sources of high-quality protein
4. Mineral and vitamin supplements: salt, limestone, trace mineral premixes, and vitamin premixes
5. Additives: antibiotics, probiotics, enzymes, and other substances added to improve feed efficiency and animal health.

- Forages: Plants that are grazed or harvested for feeding to animals, such as hay, silage, and pasture.
- Grains: Seeds of cereals, such as corn, wheat, and oats.
- Oilseeds: Seeds of plants that are high in oil, such as soybeans, canola, and cottonseed.
- By-products: Materials that are left over after processing other products, such as wheat middlings, corn gluten feed, and distillers grains.
- Additives: Materials that are added to feed to improve its nutritional value or palatability, such as vitamins, minerals, and flavorings.