Increasing soybean meal levels with or without DDGS National Hog Farmer, Margaret Putnam and Amy Petry April 2026 Commercial Pork Production | distillers dried grains with solubles | functional compounds | Immune Response | Soybean Bioactive Compounds | swine health Abstract Soybean Meal Swine Health Rochell, S. J., S.J., L. S. Alexander, G. C. Rocha, W. G. Van Alstine, R. D. Boyd, J. E. Pettigrew and R. N. Dilger July 2015 pig feed | porcine reproductive and respiratory syndrome virus | PRRSV | swine health | University of Illinois