Farmed Animals

Genetic Selection and Livestock Welfare Trade-offs

Selective breeding has created production gains that come at the cost of significant welfare problems in modern livestock.

Key Facts

Modern broilers grow twice as fast as birds from 1960 at the same age
Holstein dairy cows produce over 10,000 litres of milk per lactation, double the 1960s average
High milk yield in dairy cows is strongly associated with mastitis, lameness, and metabolic disease
Fast-growing broilers have endemic leg problems, heart disease, and shortened lives
Selecting breeding goals that include welfare traits is technically feasible but economically challenging

Welfare Considerations

The welfare consequences of extreme genetic selection for production traits have been severe and predictable. Animals bred beyond their physiological limits develop endemic health problems that were absent in slower-growing, lower-yielding predecessors. Incorporating welfare traits into breeding programmes and capping extreme production levels are necessary interventions.

What You Can Do

Support campaigns for breed welfare standards in poultry and dairy
Choose products from lower-yielding, welfare-positive breeds
Advocate for inclusion of welfare traits in breed improvement programmes
Support research into the relationship between production level and welfare outcomes
Engage with breeding companies about integrating welfare into selection goals