Impact of precision feeding during gestation on the productive career of sows monitored over three reproductive cycles

Precision Feeding in Gestation: Real Gains, But Some Tradeoffs to Work Through

Feeding gestating sows is costly and has a significant environmental footprint. Researchers at CDPQ and Université Laval wanted to know whether tailoring feed to each sow's actual needs — rather than using one standard ration for all — could improve performance while reducing nutrient inputs.

Over three reproductive cycles, 393 gilts received either conventional feeding or a precision feeding ration adjusted by parity or individually. Researchers tracked body condition, litter performance, and sow longevity throughout.

The results are encouraging: precision feeding reduced lysine intake by 15%, crude protein by 11%, and digestible phosphorus by 17%, while producing about 0.7 more piglets weaned per litter. The tradeoff — sows on precision feeding had slightly more unproductive days and a tendency to be culled earlier after the first cycle.

For producers, this approach shows real promise — fewer inputs, lower environmental impact, and better litter performance. Some fine-tuning is still needed to protect gilt longevity before wide-scale adoption.