AUTHOR=Arai Toshiro TITLE=The Development of Animal Nutrition and Metabolism and the Challenges of Our Time JOURNAL=Frontiers in Veterinary Science VOLUME=1 YEAR=2014 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2014.00023 DOI=10.3389/fvets.2014.00023 ISSN=2297-1769