Modern dairy cows are culled after 2-3 lactations due to production decline and disease, far short of their potential 20-year lifespan.
Cows culled after 2-3 lactations never reach their behavioral and psychological maturity. High-producing cows in intensive systems are metabolically stressed throughout their short productive lives. Culling itself involves additional transport and slaughter stress. Longevity selection and better welfare management can simultaneously improve productivity and welfare outcomes.