The average UK dairy cow lives just 5-6 years before being culled - a fraction of her natural lifespan. Understanding the drivers of premature culling reveals the systemic welfare pressures of high-yield dairy production.
The short productive life of dairy cows reflects the cumulative welfare cost of high-yield production systems. Metabolic diseases from peak milk yield demands, repeated pregnancies, lameness and mastitis create a cycle of chronic health compromise that makes extended productive life increasingly rare. A cow culled at 5-6 years has lived through multiple health crises; extending her life to 8-10 years would require addressing the systemic health problems that currently make early culling economically rational. The economic and welfare arguments for longevity converge - longer-lived cows are healthier cows - but achieving this requires genetic selection for health traits alongside production, improved husbandry and reduced yield pressure.