Home to everything the sheep industry needs to know about managing Ovine Johnes Disease and preventing its spread Central to the plan is the national Sheep Health Declaration – the most important disease risk management tool that buyers can use. Management of Ovine Johne’s Disease (OJD) in Australia beyond 2018 will continue as part of the Sheep Health Project at Animal Health Australia, enabling producers to still be able to use all the on-farm practices and tools currently recommended as part of a best practice approach to control. Find out more.