This U.S. industry comprises establishments primarily engaged in manufacturing animal food (except dog and cat) from ingredients, such as grains, oilseed mill products, and meat products. Cross-References. Establishments primarily engaged in-- ? Manufacturing dog and cat foods--are classified in U.S. Industry 311111, Dog and Cat Food Manufacturing; ? Slaughtering animals for feed--are classified in Industry 31161, Animal Slaughtering and Processing; and ? Manufacturing vitamins and minerals for animals--are classified in Industry 32541, Pharmaceutical and Medicine Manufacturing.