Gene Editing for Animal Welfare: Promise and Ethical Complexity

Gene editing technologies such as CRISPR offer the possibility of reducing animal suffering by modifying traits linked to welfare harms, but raise significant ethical and practical questions.

Key Facts

Researchers have proposed editing chickens to eliminate the pain signalling pathway for debeaking-related chronic pain in production systems
Gene editing has been used to produce myostatin-knockout cattle with enhanced muscle mass, raising welfare concerns about joint stress and birthing difficulties
Attempts to edit pigs to resist PRRS virus — a major source of disease-related suffering on farms — have shown promising results in trials
The Polled project aims to eliminate horn-growing genes in cattle, removing the welfare harm of dehorning without requiring the procedure
Critics argue that gene editing for welfare addresses symptoms rather than causes, and may entrench systems that should be reformed instead

Welfare Considerations

Gene editing for welfare presents a genuine ethical dilemma. Where it can reduce specific, well-defined suffering without creating new welfare harms, it may represent genuine progress. However, using gene editing to adapt animals to intensive production systems rather than adapting systems to animal needs risks normalising a paradigm in which animals are engineered to fit inherently welfare-compromised conditions. Ethical evaluation of each application requires asking not only whether the edit reduces a specific harm but whether it does so in a way that advances or undermines broader welfare reform.

What You Can Do

Support peer-reviewed assessment of gene editing applications using welfare impact frameworks
Advocate for regulatory oversight that includes welfare impact assessment before commercial deployment
Engage critically with gene editing proposals to distinguish genuine welfare benefits from system-entrenchment risks
Support the development of ethical guidelines for welfare-motivated gene editing across research communities
Push for transparency requirements so that gene edited animals are labelled in commercial supply chains