Modern dairy cows are culled at an average age of 4-5 years — far below their natural lifespan of 20+ years. Improving dairy cow longevity through better welfare management represents both an ethical and environmental improvement.
Dairy cow longevity aligns welfare and sustainability in a rare and important way. Short productive lives indicate management failures — lameness, mastitis, reproductive dysfunction — that cause chronic suffering throughout a cow's brief productive career. Cows that live longer are healthier, have fewer welfare problems, and have lower environmental impact per unit of milk produced. Improving longevity requires addressing the underlying welfare problems that drive early culling: lameness prevention, mastitis control, reproductive health management, and cow comfort. The business case for longevity improvement — lower replacement costs, better lifetime production — reinforces the welfare case.