Rethinking healthy sow performance
For decades, sow productivity was traditionally measured in piglets per sow per year. But a shift in economic pressures, sustainability goals and animal welfare standards is pushing the industry to adopt a more meaningful performance metric: kilogrammes of pig meat produced per sow lifetime. This broader, output-focused view changes how we evaluate nutrition – and particularly the role of trace minerals.
Historically, inorganic trace minerals such as oxides, sulphates and hydroxy minerals have been the industry standard. However, their low bioavailability and reactivity with other dietary components can reduce their effectiveness and economic return and result in wasted minerals being excreted. In contrast, methionine hydroxy analogue chelates (MHAC/chelate of hydroxy analogue of methionine) offer superior bioavailability and functional duality. They supply both available essential minerals and a source of methionine. These innovations were designed to deliver more value per tonne of feed and therefore per pig, and to help producers meet evolving challenges such as:
- zinc and copper usage restrictions
- reduced reliance on in-feed antibiotics
- sustainability and waste management demands.
Lifetime output as a performance metric
When you assess productivity by pig meat per sow lifetime, it reveals the cumulative performance benefits of improved mineral absorption. Strategic MHAC supplementation has shown consistent improvement in:
- more pigs weaned per litter
- the percentage of sows reaching parity 3 or beyond
- piglet viability and weight gain
- feed efficiency and nutrient utilisation
- final meat produced per inventoried sow.
MHACs allow for long-term ROI optimisation, aligning with the reality that a productive sow stays healthy, fertile and efficient across multiple cycles.
Addressing environmental and regulatory pressures
In many regions, excessive mineral excretion is facing tougher regulatory oversight, particularly when it comes to zinc and copper. Because MHACs are absorbed more efficiently, they can be included at lower dietary levels without sacrificing performance. This provides a technical advantage, especially in nutrient-sensitive production zones.
Figure 1 – Relative increase in tissue Zn concentration for Zn-MHAC vs Zn-AAC using stable isotopes (Acosta et al., 2023).
Resilience in modern production environments
Today’s sows are expected to thrive under more complex conditions such as increased growth rates during development, high litter sizes, group housing, restrictions on the use of antibiotics, heat stress and dynamic housing systems. MHACs support immune resilience, tissue repair and skeletal integrity, helping animals adapt to:
- higher metabolic stress
- more intensive reproductive cycles
- greater piglet output per parity.
Long-term productivity vs. short-term cost
Shifting from a “cost per tonne” mindset with respect to trace minerals to a financial return per sow lifetime redefines what good mineral nutrition looks like. It is no longer about the cheapest input; it is about sustainable performance across the sow’s whole productive life, including the quality of her offspring.
Key takeaways
These details, taken from my chapter in the new book Nutrition and Production Strategies for Today’s Sows, make a compelling case for why the future of sow nutrition must be output-focused. A key takeaway from years of research is that more is not always better when it comes to trace minerals. What truly matters is not the total amount added to the feed, but how much of it the animal can actually absorb and utilise.
Studies highlighted in the chapter from the book, including research conducted in Spain on sow lameness and locomotion, show that excessive inclusion of inorganic minerals offers no added benefit and may even exacerbate issues such as oxidative stress and mineral interactions. By contrast, highly bioavailable sources such as MHAC allow for lower inclusion rates while still supporting long-term productivity, mobility and reproductive performance. This shift in mindset – from quantity to quality – is crucial for both environmental stewardship and economic returns.
References are available on request.
