Mouse enrichment

Bayne, Kathryn; Würbel, Hanno (2012). Mouse enrichment. In: Hedrich, Hans J. (ed.) The Laboratory Mouse (Second Edition) (pp. 547-566). Amsterdam: Elsevier 10.1016/B978-0-12-382008-2.00023-4

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The provision of environmental enrichment to mice used in research is a topic that generates often widely divergent opinions as to the value of this husbandry practice. The literature is replete with examples of the positive effects enrichment has on the animals’ welfare. However, many published studies have demonstrated that enrichment can impact research in unforeseen and unpredictable ways, and thus may pose a concern as a confounding variable. Indeed, an analysis of the outcomes of murine enrichment studies suggests that both views are accurate, and thus inclusion of environmental enrichment in the mouse cage should be done with the understanding that while the use of appropriate cage complexities can certainly enhance animal welfare and concomitantly provide a better animal model for scientific purposes, the wrong choice of enrichment may negatively impact the welfare of the animals or the research. This chapter describes our current understanding regarding the effects of several commonly used mouse enrichments.

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