Hypovitaminosis A is the most common nutritional deficiency in pet parrots and other companion birds, causing serious welfare harms that are almost entirely preventable through appropriate diet.
Vitamin A deficiency in pet birds represents a chronic, progressive welfare harm caused almost entirely by inappropriate feeding practices passed between pet owners and perpetuated by pet stores selling seed mixes as complete diets. Affected birds suffer from recurrent respiratory infections, painful oral lesions, impaired vision, and systemic tissue damage - a long-term trajectory of declining health. The tragedy is the near-complete preventability of this condition through diet correction. Birds are often presented to vets with advanced deficiency after years of seed-only feeding, with irreversible tissue changes. Owner education at the point of bird acquisition is the highest-leverage intervention, but pet stores and breeders often fail to provide accurate nutritional guidance. Converting seed-dependent birds to pelleted diets requires patience and gradual transition but is achievable and dramatically improves long-term welfare.