At a time when zoo populations are being relied upon for future progeny and long-term sustainability of our avian populations, nutrition is vitally important. However, diet review, evaluation and change are often met with disinterest and complacency. Link nutrition to poor health, associated veterinary costs, poor egg production and low chick viability and suddenly the subject becomes more important. High standards are expected in other aspects of avian husbandry yet the nutritional composition of the diets often remains unknown. This article highlights advances in nutrition, useful resources, means of keeping feeding records, and tools available to evaluate and review avian diets in nutritional terms. Regularly reviewing diets ensures the nutritional care of birds keeps pace with other areas of husbandry.