Vitamin A toxicosis in a lorikeet flock

Area of Science:

• Avian nutrition and toxicology
• Comparative pathology in birds

Background:

• Granivorous and nectarivorous birds have unique dietary requirements for vitamin A.
• Wild diets for these species are typically low in preformed vitamin A.
• Birds rely on converting dietary carotenes into vitamin A.

Observation:

• A flock of lorikeets experienced multiple clinical problems.
• These health issues coincided with excessive vitamin A supplementation.

Findings:

• Vitamin A toxicosis is a newly identified risk for certain bird species.
• Over-supplementation of vitamin A can lead to adverse health outcomes.
• Dietary conversion of carotenes is the natural source of vitamin A for these birds.

Implications:

• Veterinarians and bird owners should exercise caution with vitamin A supplementation.
• Understanding species-specific vitamin A metabolism is crucial for preventing toxicity.
• Further research is needed to establish safe supplementation levels for pet birds.