Kevin manages 550 cows at Ohakea, Manawatu. The farm produces winter milk, and autumn and spring calvers are all run as one herd. For several years he experienced seemingly intractable problems of clinical mastitis in the herd. With help from his mastitis-trained vet, Will Tulley, Senior Practising Veterinarian in Dairy Cattle Health at Massey University and SmartSAMM, Kevin was able to reduce clinical mastitis in spring.