Toxoplasmosis, a disease carried by cats, is costing sheep farmers tens of millions of dollars annually and is also killing dolphins.
Tasman farmer, Lloyd Faulkner is heartbroken to lose 110 lambs to the disease this year, despite his ewes being vaccinated. The 88-year-old says his Tapawera farm has never been so badly affected.
Kathryn also talks to veterinarian, Roger Bay from Town and Country Vets in Richmond, near Nelson, who says toxoplasmosis is causing huge problems nationally and taking an economic toll.