Ringing the noses of pigs kept in outdoor systems to prevent rooting causes chronic pain and prevents a fundamental natural behaviour, raising significant welfare concerns about its routine use.
Nose ringing prevents a behaviour that pigs are intensely motivated to perform, creating a welfare conflict that cannot be resolved by the ring itself: the pig continues to attempt rooting but experiences pain when doing so. The ring does not eliminate the rooting motivation, it converts rooting into a source of repeated pain. Alternative approaches including rotational grazing systems, designated rooting areas with sacrificial vegetation, and electric fencing to protect specific areas can achieve pasture management goals without causing chronic pain to the pig. Welfare-conscious outdoor pig producers are demonstrating that profitable pig farming on pasture does not require nose ringing when management systems are appropriately designed.