Gordon Dryden is the principal of a consultancy specializing in animal nutrition, an associate editor of Animal Production Science, and a member of the IUCN Deer Specialist Group and the IDBC Scientific Steering Committee. He was previously senior lecturer in animal nutrition at the University of Queensland, Gatton, and has since held honorary positions at The University of Queensland and Curtin University of Technology. He has a PhD in animal nutrition from the University of New England, Australia. His research, carried out in Australia and internationally, covers sheep, cattle, deer, horses and pigs; encompassing requirements for energy, protein and water, responses to nutrient supplements, digestion and passage kinetics, animal feeding behavior, tolerance of water salinity, and near infrared reflectance spectroscopy. He has consulted internationally in animal nutrition and stock feed processing, and the design of tertiary agriculture programs in Australia, New Zealand and Timor Leste.