Ovine Johne's Disease (OJD), also known as an 'iceberg disease', is impacting ScotSheep producers by reducing flock productivity and increasing costs. The condition, which is often undetected, leads to higher replacement costs, lower lambing rates, and reduced values for cull ewes. It also increases feed and medicine expenses and contributes to higher greenhouse gas emissions. While the dairy industry focuses on controlling Johne's in cattle, sheep and goat herds can vaccinate with Gudair, which has been shown to reduce shedding and mortality by up to 90%. Farmers are encouraged to test their flocks for OJD and seek advice from their vet on the best testing methods and subsidies available to assist with the costs.