Selection for hyperprolific sow genetics has dramatically increased litter sizes but created welfare problems for piglets and sows. Understanding this trade-off is essential for welfare-conscious farming.
Hyperprolific pig genetics represents a case where commercial selection has created a welfare problem embedded in the genetics of the animal. Sows producing more piglets than they can feed, and piglets born too small to compete for teats, are experiencing welfare costs that cannot be managed away at farm level. The solution lies upstream in breeding programme objectives that weight welfare traits alongside productivity. Some breeding companies are making progress on this, demonstrating that commercial and welfare interests can be realigned through sustained commitment.