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Summary
This summary is machine-generated.

A new scoring system objectively assesses environmental enrichment for laboratory mice, improving animal welfare. This system helps select effective enrichment to reduce abnormal behaviors like food shredding and ear trauma.

Keywords:
DIO, diet-induced obeseKO, knockout

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Area of Science:

  • Laboratory animal science
  • Animal behavior
  • Animal welfare

Background:

  • Environmental enrichment is crucial for laboratory animal welfare, promoting species-specific behaviors and mitigating abnormal repetitive behaviors.
  • Assessing the effectiveness of enrichment is vital for refining animal care protocols.

Purpose of the Study:

  • To develop and apply a scoring system for objectively evaluating environmental enrichment in singly housed mice.
  • To assess the efficacy of selected enrichment items in reducing abnormal behaviors.

Main Methods:

  • A scoring system was developed to quantify the usage of enrichment items by singly housed mice.
  • The system was applied to evaluate enrichment for repetitive food shredding in CD-1 mice and focal auricular trauma in BALB/c mice.
  • Scoring criteria included enrichment use, nest incorporation, and reduction of abnormal behaviors.

Main Results:

  • Manzanita sticks and running wheels reduced repetitive food shredding in CD-1 mice, with manzanita sticks chosen for practical reasons.
  • Gnawing items decreased focal auricular trauma associated with ear tags in BALB/c mice.
  • The scoring system provided objective data on enrichment effectiveness.

Conclusions:

  • A standardized scoring system enables objective assessment and selection of environmental enrichment for specific needs in laboratory animal care.
  • This approach enhances animal welfare by effectively redirecting abnormal behaviors and improving the evaluation of enrichment strategies.