We need to protect the BVD Negative herds by finding every PI (Persistently Infected) animal in Wales and prevent them from infecting other cattle.
Mae angen i ni ddiogelu'r buchesi BVD Negatif drwy ddod o hyd i bob anifail PI (sydd wedi'i heintio'n barhaus) yng Nghymru a'i atal rhag heintio gwartheg eraill.