Effects of journey duration and temperature during pre-slaughter transport on behaviour of cull sows in lairage

Cecilie Kobek-Kjeldager*, Line Dinesen Jensen, Leslie Foldager, Karen Thodberg, Dorte Lene Schrøder Petersen, Mette S Herskin

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

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Abstract

This observational field study investigated the effects of journey duration, temperature, and waiting duration before unloading on the behaviour of 562 cull sows during lairage from 23 commercial loads. Each load consisted of sows originating from more than one herd, thus experiencing variable pre-slaughter transport and management. In lairage, sows were mixed in groups of 25, involving animals from all journey durations (min-max: 0.8–8.4 h) and video monitored for 60 min. At first most sows were in upright position (approximately 80–90%), decreasing to 30–40% after 30 min. After 60 min, 42% of the sows had initiated aggression (min-max: 0–43 events/sow), 28% had been subjected to aggressive behaviour (min-max: 0–14 events/sow), and 36% s were observed drinking (min-max: 0–16 events/sow). Several significant interactions were found between journey duration, the average temperature in the vehicle and lairage pen (averages: 4.3–26.2 °C) and waiting duration before unloading (min-max: 3–25 min). For example, after short journeys, sows exposed to higher temperature carried out more aggressive behaviour, while a higher temperature after long journeys was associated with more lying and less drinking. This suggests that the sows prioritised lying behaviour over drinking and establishing a dominance hierarchy. We discuss how the results may be interpreted as behavioural signs of fatigue, but further studies, for example involving quantification of physiological and motivational indicators, are needed to clarify this. Irrespectively, the present findings suggest that a stay in a lairage pen, as part of the pre-slaughter logistic chain, involves challenges for the welfare of the cull sows.
Original languageEnglish
Article number105016
JournalResearch in Veterinary Science
Volume164
Number of pages11
ISSN0034-5288
DOIs
Publication statusPublished - Nov 2023

Keywords

  • Abattoir
  • Aggressive behaviour
  • Drinking behavior
  • Heat stress
  • Slaughterhouse
  • Welfare challenge

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