This document discusses animal feed and feed mixing for pigs. It describes the nutritional requirements for feeding pigs and identifies six different types of pig feeds: creep feed/starter feed, weaner feed, grower feed, fattener feed, pregnant sow feed, and lactating sow feed. The document provides details on each feed type and lists common feed ingredients including corn, barley, soybean meal, and animal by-products. It emphasizes that feed costs account for 55-70% of the total cost of raising hogs and that combining the right kinds of feed in a balanced ration is important.