ISSUE FOCUS 54 FEED & ADDITIVE MAGAZINE January 2026 tion. In a trial conducted on a commercial pig farm in Spain during 2024, the performance of piglets receiving a diet supplemented with a dual-encapsulated formulation was compared against a diet supplemented with high doses of a non-encapsulated acid blend. The study involved two groups of piglets over a 42-day post-weaning period: 1. A control group fed a standard diet supplemented with 8 kg/t of an acid blend from days 1–14 and 4 kg/t from days 15–42. 2. A treatment group receiving the same basal diet with 800 g/t of a dual-encapsulated formulation while still receiving 2 kg/t of the acid blend from days 1–14, and 1 kg/t from days 15–42. Performance indicators included average daily gain (ADG), feed intake, feed conversion ratio (FCR), fecal consistency, and veterinary interventions. Fecal samples were analyzed at the end of the trial to assess microbial composition. Results showed that piglets receiving the dual-encapsulated formulation exhibited: • +8% increase in ADG compared to the control. • +5.5% increase in feed intake, resulting in a 2.5% improvement in FCR. • Improved fecal consistency, with fewer cases of diarrhea and reduced need for electrolyte treatments. • Favorable shifts in gut microbiota, including lower E. coli counts and higher abundances of beneficial bacteria such as Lachnospiraceae (butyrate producers) and lactic acid bacteria. An economic assessment further highlighted a return on investment exceeding 8:1, driven by improved growth, reduced veterinary costs, and enhanced feed efficiency. IMPLICATIONS FOR PIG PRODUCTION These findings underscore the potential of dual microencapsulation technologies to serve as reliable and sustainable alternatives to pharmacological additives. By combining site-specific delivery with multi-targeted functionality, they address the complex biological challenges of the weaning phase more comprehensively than single-mode solutions. From a practical perspective, dual encapsulation supports: • More uniform piglet performance, • Enhanced resilience to microbial challenges, • Reduced dependence on high-dose additives, • Improved economic sustainability of production. As global pig production continues to evolve, technologies that integrate precision delivery with proven biological efficacy are likely to play a central role in shaping the future of swine nutrition. CONCLUSION Dual microencapsulation represents a significant advancement in feed additive design, providing precision, consistency, and multifunctionality through the controlled, sequential release of bioactive compounds. By protecting sensitive molecules during feed processing and gastric passage, the technology ensures their targeted availability in specific regions of the gastrointestinal tract, where they can modulate microbiota, support digestive function, and enhance immune resilience. This stepwise delivery allows diverse functional compounds - such as antimicrobials, antioxidants, and immunomodulators - to act synergistically at appropriate intestinal sites, improving nutrient utilization, gut health, and growth performance while reducing the need for high-dose additives or pharmacological interventions. The approach also minimizes variability in outcomes, enables lower inclusion levels, and aligns with sustainable production goals by supporting animal welfare and reducing reliance on antibiotics or zinc oxide. Ongoing field applications and research demonstrate that dual microencapsulation provides a science-based, practical solution for optimizing post-weaning piglet nutrition, integrating performance, health, and sustainability in modern swine production. Photo: Nuqo
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