Two-Stage Fermented Feather Meal-Soybean Meal Product Improves the Performance and Immunity of Lactating Sows and Piglets

This study aimed to investigate the effects of a two-stage fermented feather meal-soybean meal product (TSFP) on performance, clinical blood biochemistry, and immunity sows piglets. TSFP was by Saccharomyces cerevisiae Y10 for three days in second stage, which showed similar results five-day fermentation B. coagulans (p > 0.05). Fifty hybrid (Duroc × KHAPS black pig) were randomly assigned into dietary supplementation groups 2% fish or different levels at 0%, 1%, 2%, 3%. The that body weight gain feed conversion ratio 3% better than control group during gestation period (d 80–114) < During lactation period, best weaning litter In sows, interferon-γ immunoglobulin G (IgG) higher piglets, urea decreased IgG superior oxidative burst phagocytes those conclusion, exhibits advantages performance lactating Furthermore, adding performance.