... of restrictive amino acids , 3.digestion and absorption rate high Poultry feed additives:Yeast powder(Feed grade) 40%,45%,50%,55%,60%. ... A. Function and use1. Is a quality protein ... the digestive tract. 4. Enhance immunity, adsorption Pathogenic factor, improve animal health. B. Recommended dosage Pig 2% -5%Poultry 2% ...