Dave West, BVSc (Massey), PhD (Massey), FACVSc Emeritus Professor, was formerly at the Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North. Neil Bruère, ONZM, BVSc (Sydney), PhD (Glasgow), DVSc (Sydney), FACVSc Emeritus Professor, was previously Professor of Veterinary Medicine and Clinical Pharmacology and formerly Head of Department, Veterinary Sciences, at Massey University, Palmerston North. Anne Ridler is Associate Professor Sheep & Beef Cattle Health & Production at Massey University's Institute of Veterinary, Animal and Biomedical Sciences. She has worked in farm animal veterinary practice in New Zealand, and at the Royal Veterinary College in London.