ISSUE FOCUS FEED & ADDITIVE MAGAZINE November 2025 51 Average Conversion Averages, kg/kg Pre-starter, d 0-14 1,900 1,800 1,700 1,600 1,500 1,400 1,300 1,200 1,100 1,000 1,270 1,730 1,700 1,630 1,590 1,150 Starter, d 14-42 Overall, d 0-42 Control Presan-FX Figure 5. Feed conversion ratio averages (83% confidence interval as error bars) of weaned piglets that received Presan®-FX from day 0 to 42 post-weaning provements in final body weight (+830 g), ADG (+21.0 g/day) (Figure 3), and ADFI (+21.5 g/ day) (Figure 4), along with improved FCR (-4 points) (Figure 5). Another study demonstrated a clear dose-response effect: At an inclusion level of 2 kg per tonne, Presan-FX delivered the largest improvements in ADG (+89 g) and FCR (-10 points). Even when statistical significance wasn’t reached, the consistent numerical improvements translated into tangible economic value, generating between €0.40 and €0.55 more per piglet compared to control groups (Figure 6). For producers, these results suggest that Presan-FX not only supports animal health but also enhances profitability, particularly when used during the critical nursery phase. REPLACING ZnO WITH A SYNERGISTIC BLEND Building on these findings, researchers explored whether Presan-FX could reduce or eliminate the need for high levels of ZnO to support piglets’ growth and performance. In comparative trials, piglets fed a diet where high ZnO was partially replaced with Presan-FX showed comparable performance metrics, including final body weight, ADG, and ADFI along with a better FCR (Figure 7-8). Another trial investigated whether Presan-FX could eliminate the €1.16 €-0.25 Presan-FX investment ADG+Mortality effect (extra revenue) Additional feed effect Extra value per herd €0.55 €-0.36 Figure 6. Return on investment of the use of Presan®-FX compared to the control diet in weaned piglets, considering local market prices at the time of the experiment Phase 1 257 286 486 b a b a 575 400 467 800 600 400 200 0 ADG, g/d Phase 2 Control Presan 2 kg/t Overall period Figure 7. Average daily gain of weaned piglets that received Presan®-FX partially replacing high zinc oxide. Columns with different superscripts indicate significant differences (p < 0.05).
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