The productive lifespan of modern dairy cows has declined dramatically with intensification - short productive lives reflect poor welfare and represent an industry sustainability problem.
The short productive life of the modern dairy cow reflects a system optimized for output at the expense of individual animal welfare and longevity. A cow culled for lameness at age 5 has experienced years of accumulated health problems that caused her premature removal from the herd. The welfare and sustainability implications are significant: high turnover means more replacement heifers are required, more cows experience the health crises that trigger culling, and fewer cows benefit from experienced cow behavior and health. Farmers who prioritize longevity through genetic selection for health, good management, and reduced production pressure typically find that their cows live longer and have better lifetime productivity - a welfare and economic win aligned.