More than 1 billion people worldwide raise livestock. Globally, meat, milk and eggs currently provide nearly 13% of the energy and 28% of the protein consumed, delivering essential amino acids, many micronutrients and vitamins that are critical for children’s growth and learning as well as maternal health. Many food-insecure people in the US and especially in developing countries could benefit from animal source foods. Opportunities to reduce food insecurity through livestock research is discussed, especially in the context of the speaker’s experiences in uses of livestock in development work in Uganda and his research in animal genetics in many developing countries. Opportunities to participate in a larger global food security consortium are discussed.