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Understanding Tail-Biting in Pigs through Social Network Analysis.

Yuzhi Li1, Haifeng Zhang2, Lee J Johnston3

  • 1West Central Research and Outreach Center, University of Minnesota, Morris, MN 56267, USA. yuzhili@umn.edu.

Animals : an Open Access Journal From MDPI
|January 19, 2018
PubMed
Summary
This summary is machine-generated.

Pigs housed with littermates showed less social connection and higher tail-biting incidence. This suggests reduced social bonding may increase tail-biting risk in young pigs.

Keywords:
pigssocial network analysistail-biting

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Area of Science:

  • Animal Behavior
  • Animal Husbandry
  • Social Network Analysis

Background:

  • Tail-biting is a significant welfare issue in intensive pig farming.
  • Understanding the social factors influencing tail-biting is crucial for developing effective prevention strategies.

Purpose of the Study:

  • To investigate the association between social structure and tail-biting incidence in pigs.
  • To determine if grouping pigs by litter origin affects social connectivity and tail-biting.

Main Methods:

  • 144 pigs were grouped into littermates, non-littermates, and half-group of littermates.
  • Social network analysis was used to assess social connectivity based on video recordings.
  • Incidence of tail injury and growth performance were monitored over 6 weeks.

Main Results:

  • Littermate groups exhibited lower network density and fewer weak social ties compared to non-littermate groups.
  • Fifteen percent of pigs in the littermate group were victims of tail-biting; none were observed in other groups.
  • These findings indicate reduced social connectivity in littermate groups.

Conclusions:

  • Pigs housed with only littermates may be less socially connected.
  • Reduced social connectivity among littermates might predispose them to tail-biting.
  • Management strategies should consider social grouping to mitigate tail-biting.