LAUSR

Abstract Insufficient colostrum consumption within 24 h after birth is a major problem, causing an increased neonatal piglet mortality. The aims of the present study were to determine the risk factors associated with colostrum consumption by neonatal piglets and the proportion of piglets that had inadequate colostrum from hyper-prolific sows. In total, 861 live-born piglets from 59 Danish Landrace × Yorkshire crossbred sows (parities 1–6), farrowed naturally, were included in the study. The sow characteristics recorded included farrowing duration, total number of piglets born (TB), number of piglets born alive (BA), number of stillborn piglets (SB) and number of mummified foetuses (MM) per litter. Individual piglet data were recorded during delivery, including the time of birth, individual birth weight before colostrum ingestion and body weight at 24 h postpartum. Cumulative birth interval of the piglets was classified into six groups:  0.05) or 1000–1299 g (P > 0.05) but was more pronounced in piglets with low birth weight (P