Weaning and beyond: using data to engage farmers in post-weaning heifer management

The post-weaning period is a critical yet often overlooked stage in dairy heifer development, profoundly influencing age at first calving (AFC), first-lactation performance and overall herd productivity. This article examines the challenges and opportunities of post-weaning heifer management, highlighting the role of veterinary practitioners in optimising this phase despite reduced engagement. Data-driven insights from milk recording systems provide actionable key performance indicators (KPIs): AFC, first-lactation production and survivability. The research underscores the benefits of achieving an AFC of 23–24 months, including enhanced lifetime milk yield, reduced culling risks and improved herd sustainability. Economic and environmental gains further support these targets, as delayed AFC escalates costs and emissions. Practical strategies in nutrition, health protocols, stress minimisation and genetic selection are discussed, emphasising collaborative approaches between producers and practitioners. By focussing on post-weaning management, dairy operations can achieve sustainable productivity while meeting economic and ecological goals.