ISSUE FOCUS 24 FEED & ADDITIVE MAGAZINE November 2023 In this context, a new generation feed ingredient, YANG — which includes specifically selected yeast fractions — has been proven to help maintain the health of calves and other young ruminants. YANG is a multi-strain yeast derivative formulated to strengthen animals’ natural defenses with a patented, synergistic effect on the immune response. It combines two complementary actions that reinforce animals’ natural defenses: - A strong pathogen binding capacity, effective against a wide range of undesirable bacteria compared to single-strain yeast derivatives. - A patented broad and balanced immune modulation that doesn’t carry the risk of over-stimulation sometimes observed in cases of single immune receptor activation by traditional yeast derivatives. Studies (Figure 2) were conducted on different feeding conditions with calves during the pre- to post-weaning period. Results show calves fed YANG in the starter feed (ST) or milk replacer (MR) exhibit a significant reduction in the percentage of calves treated with antibiotics. These results suggest that YANG activates immunity and allows calves to better cope with digestive sensitivity at this critical period of life. Figure 2. Multi-studies synthesis, percentages of calves treated at least once with antibiotics during the trial. BW = body weight, d = day, ST = YANG included in the starter feed, MR = YANG included in the milk replacer. Figure 3. Effect of S. cerevisiae CNCM I-1077 on rumen papillae development (Bittar and Ferreria, 2007).
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