Research Ethics

Lab Animal Pain Assessment and Management

Accurate pain assessment in laboratory animals is fundamental to the 3Rs principle of refinement, yet remains challenging due to species differences in pain expression.

Key Facts

Grimace scales measuring facial expressions have been validated for pain assessment in mice rats rabbits and horses
Under-treatment of pain in laboratory animals is a documented welfare problem in research facilities
The UK Animal Welfare Act requires pain to be minimized and analgesics used whenever possible
Pain interferes with experimental data quality providing a scientific as well as welfare reason for adequate analgesia

Welfare Considerations

Pain management in laboratory animals has historically been inadequate partly due to concerns that analgesics would confound experimental results. Research has demonstrated that inadequately managed pain itself confounds results more than appropriately used analgesics. The welfare and scientific cases for adequate pain management align perfectly, yet institutional culture and training gaps continue to impede consistent implementation across research facilities.

What You Can Do

Support organizations advocating for mandatory pain management training for all animal research personnel
Donate to research funding grimace scale development and validation across more species
Advocate for institutional animal care committees to include welfare specialists with pain management expertise
Support regulatory requirements for analgesic use as a default rather than an exception in animal research