Herder Kenya (IMAGE) Colorado State University Caption Livestock, such as sheep and cattle, rely on natural forage provided by rangelands throughout much of the world. Credit Randall Boone/Colorado State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.