Bulls are an essential investment for livestock farmers, but they can also be a costly one. During a Kgalagadi farmers’ day organised by his brother, Duncan Serapelwane, at Taylor Span farm in Heuningvlei, Tebogo Serapelwane, the chief research technician at Vryburg bull testing station, spoke to farmers about the critical role of managing their investments for long-term profitability.