The transition period around calving is the most welfare-critical phase in the dairy cow year, with metabolic disease and immune suppression at peak risk during this time.
Transition period management is one of the highest-leverage welfare interventions available to dairy farmers. Cows experiencing subclinical ketosis suffer energy deficiency, immune suppression, and increased susceptibility to mastitis, lameness, and reproductive failure. Preventing transition disease through appropriate dry cow nutrition, controlled body condition, adequate dry cow space, and prompt detection and treatment of early disease reduces suffering and improves long-term welfare across the lactation. Vets and nutritionists working collaboratively with farmers produce the best outcomes.