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Updated: Jan 6, 2026

Transition of Farm Pigs to Research Pigs using a Designated Checklist followed by Initiation of Clicker Training - a Refinement Initiative
Published on: August 21, 2021
Robert C Hubrecht1, Elizabeth Carter2
1UFAW, the Old School, Brewhouse Hill, Wheathampstead, Hertfordshire AL4 8AN, UK. hubrecht@ufaw.org.uk.
The Three Rs (Replacement, Reduction, Refinement) principles for humane animal experimentation were developed through the collaborative efforts of UFAW, Russell & Burch, and guided by Sir Peter Medawar. Their work significantly impacted global animal welfare legislation.
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