The productive lifespan of modern dairy cows is dramatically shortened by the physical demands of high milk production, leading to premature culling of animals in their prime.
The short productive lifespan of modern dairy cows reflects the extreme physiological demands placed on animals selected for maximum milk output. High milk yields create a negative energy balance in early lactation, forcing cows to mobilize body reserves and predisposing them to metabolic diseases like ketosis and milk fever. Chronic lameness causes persistent pain and affects feeding behavior, creating a downward welfare spiral. The industry term 'involuntary culling' obscures the reality that most cows are removed from herds due to welfare-compromising health conditions rather than old age.