Feed efficiency phenotypes in lambs involve changes in ruminal, colonic, and small-intestine-located microbiota

Montana Agricultural Experiment Station (project MONB00113); National Institute of General Medical Sciences of the National Institutes of Health (NIH-NIGMS: award number P20GM103474); Enhancing the Competitiveness of U.S. Beef (MONB00195); Multistate Research Project (W3177, W2010); Integrated Approach to Enhance Efficiency of Feed Utilization in Beef Production Systems (MONB00196)