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Evaluating Pain and Analgesia Effectiveness Following Routine Castration in Rabbits Using Behavior and Facial

Amy L Miller1, Jasmine M Clarkson2, Caroline Quigley3

  • 1School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom.

Frontiers in Veterinary Science
|March 17, 2022
PubMed
Summary
This summary is machine-generated.

The rabbit grimace scale (RbtGS) effectively identifies pain in rabbits post-orchidectomy. A higher meloxicam dose with local anesthetic provided superior pain management compared to lower doses alone.

Keywords:
analgesiabehaviorpainrabbitrabbit grimace scale

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Area of Science:

  • Veterinary Science
  • Animal Welfare
  • Pain Management

Background:

  • Pain assessment in rabbits is crucial for ethical research and data integrity.
  • The rabbit grimace scale (RbtGS) is a potential tool for rapid pain evaluation.
  • Orchidectomy is a common surgical procedure in rabbits requiring effective analgesia.

Purpose of the Study:

  • To validate the rabbit grimace scale (RbtGS) as a pain assessment tool in Dutch belted (DB) and New Zealand white (NZW) rabbits following orchidectomy.
  • To compare the efficacy of different analgesic protocols in managing post-operative pain.

Main Methods:

  • Rabbits (DB and NZW breeds) were subjected to orchidectomy and received analgesia.
  • Behavioral analysis and the rabbit grimace scale (RbtGS) were used to assess pain at multiple time points pre- and post-surgery.
  • Two analgesic protocols were compared: low-dose meloxicam (0.2 mg/kg) versus high-dose meloxicam (0.6 mg/kg) with local anesthetic infusion.

Main Results:

  • Rabbits exhibited increased pain behaviors and RbtGS scores post-orchidectomy.
  • Dutch belted rabbits on low-dose meloxicam showed more pain behaviors than those receiving higher-dose meloxicam with local anesthetic.
  • The RbtGS effectively correlated with behavioral analysis in identifying pain in rabbits.

Conclusions:

  • The rabbit grimace scale (RbtGS) is a viable adjunct for rapid pain assessment in rabbits after orchidectomy.
  • Higher-dose meloxicam combined with local anesthetic offers superior pain relief compared to lower-dose meloxicam alone in rabbits.