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The effect of combining different environmental enrichment materials on enrichment use by growing pigs

By Jonathan H. Guy, Zoe A. Meads, Robert S. Shiel, Sandra A. Edwards

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EU legislation requires that growing pigs are provided with suitable materials that satisfy their needs for investigation and manipulation. Although commercial pig keepers have tried a variety of different enrichment materials and methods of presentation, the benefits to the pig have not always been clear. The aim of this paper was to determine: (1) the extent to which provision of separate enrichment materials gives predictable additive increases in occupation time, (2) whether there is consistency in the relative use of different enrichment materials over time and, if so, and (3) whether a rapid methodology could be used to evaluate the relative enrichment value of a particular material for growing pigs. A total of 36 growing pigs (mean liveweight 36kg) were used, housed in 12 groups of 3 in part-slatted pens in a controlled environment building. Four enrichment materials with different properties were compared: two hanging objects suspended above the pen (sisal rope, R and metal chain, C) and two foraging substrates provided in a trough (sawdust, S and wood shavings, W). The materials were presented in pairs, in all six combinations (CR, CW, CS, RW, RS and WS) with each group of pigs exposed to one combination of materials for five days followed by the other two materials for a further five days. Time interacting with each enrichment material was determined on a per pen basis. The results showed that although the pigs very quickly habituated to all of the enrichment materials, they spent a greater proportion of time interacting with some materials than others (e.g. rope: 0.17, sawdust: 0.04; P

Publication Title Applied Animal Behaviour Science
Volume 144
Issue 3
Pages 102-107
ISBN/ISSN 0168-1591
DOI 10.1016/j.applanim.2013.01.006
Cite this work

Researchers should cite this work as follows:

  1. Enrichment
  2. Habituation
  3. Methodologies
  4. novelty
  5. Pigs