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Breeding Boar Nutrient Recommendations and Feeding Management National Swine Nutrition Guide

Boars have a profound influence on the swine breeding program. Not only do they provide a source of genetic improvement, but they also affect farrowing rate and litter size. Although nutrition of the boar is often given the least amount of attention compared to pigs in other phases of production, it serves as an important factor in determining reproductive performance of the breeding herd and overall animal wellbeing. Nutrient status influences libido (sex drive), structural soundness and longevity, sperm production, and semen quality. Factors affecting nutrient requirements include age and stage of maturity, body condition, environmental conditions, and ejaculation frequency. Many farms feed boars the sow gestation diet(s), but this feeding program may neglect some of the unique nutrient requirements that must be accounted for to optimize breeding herd performance in working boars.