Weaning is one of the most stressful events in a foal's life, with abrupt weaning causing acute and prolonged welfare harms.
Abrupt weaning causes acute stress characterised by prolonged vocalisation, searching behaviour, reduced feeding, and elevated stress hormones in both foal and mare. This period represents acute suffering that persists for days. Progressive weaning, paddock weaning with companions, and fence-line weaning where foal and mare maintain visual and olfactory contact significantly reduce welfare harms. Industry practice has not kept pace with welfare science on weaning methods.