The relationship between hyperprolific sow litter size and individual piglet welfare creates a tension that breeding selection and management must address together.
The hyperprolific sow welfare paradox is that selecting for maximum litter size beyond the sow's nurturing capacity creates individual welfare deficits that aggregate to more total suffering than moderate litter size with better individual outcomes. Litters of 20 piglets with 15% pre-weaning mortality and high levels of competition stress may produce worse total welfare than litters of 12 with 5% mortality and adequate teat access for all. This argument — based on total welfare accounting rather than maximum productivity — supports breeding selection reform toward moderate litter size with high individual viability. The challenge is that production economics currently reward litter size rather than individual viability, creating market incentives misaligned with welfare optimization.