1. Department of Animal Science, University of California–Davis, Davis, CA
2. Department of Animal Science, Cornell University, Ithaca, NY
3. Department of Dairy Science, University of Wisconsin–Madison, Madison, WI
4. U.S. Dairy Forage Research Center, Madison, WI
5. Ralph E. Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR
6. Dairy Management Inc., Rosemont, IL