Puangkhum C, Rakangthong C, Poeikhampha T, Poungpong K, Bunchasak C. Effect of Supplemental Multi-Enzymes in the Diet of Meat-Type Ducks on Production Performance, Carcass Yields and Gastrointestinal Morphology. Int. J. Poult. Sci. 2019;18(12):648–655. doi:10.3923/ijps.2019.648.655