{"topic_id":"exotic_husbandry_pet_bird_nutrition","category":"exotic-pet-husbandry","context":"---\ntopic_id: exotic_husbandry_pet_bird_nutrition\ncategory: exotic-pet-husbandry\ntitle: \"Pet bird nutrition — all-seed diets deficient in vitamin A, Ca:P imbalance\"\nlang: en\nsource: \"Merck Veterinary Manual (merckvetmanual.com) — non-Open-Access; paraphrased derived fact summary per COPYRIGHT_POLICY §3.\"\nsource_file: pdf-raw/exotic-toxicology/pet-bird.txt\ndate_parsed: 2026-07-29\ntokens_estimated: 86\nverified: true\nverification:\n  method: paraphrase\n  claims: 8\n  passed: 8\n  date: 2026-08-04\nsource_document: \"Merck Veterinary Manual (professional veterinary reference)\"\ncitation:\n  authority: \"Merck Veterinary Manual\"\n  title: \"Pet bird nutrition — all-seed diets deficient in vitamin A, Ca:P imbalance\"\n  url: \"https://www.merckvetmanual.com/exotic-and-laboratory-animals/pet-birds\"\n  retrieved: \"2026-07-29\"\n  ref: \"\"\n  doc_type: \"professional veterinary reference\"\n  needs_review: false\nlicense: paraphrase\ncopyright_note: \"Source Merck Veterinary Manual (merckvetmanual.com) is © Merck & Co., Inc. and not openly licensed; per COPYRIGHT_POLICY §3 all claims are paraphrased derived fact summaries (numbers and proper nouns preserved, sentences rewritten), not verbatim quotations.\"\nauthority_tier: T3\nauthority_tier_basis: \"T3:vet-ref\"\nauthority_tier_date: 2026-08-04\n---\n# Pet bird nutrition — all-seed diets deficient in vitamin A, Ca:P imbalance\n\nSource: Merck Veterinary Manual (merckvetmanual.com), a copyrighted professional veterinary reference. Per COPYRIGHT_POLICY §3, the points below are paraphrased derived fact summaries: numerical values and proper nouns are preserved from the source, but sentences are rewritten and not quoted verbatim.\n\n## Claims\n\n*[Paraphrased derived summary — non-Open-Access source.]* Hypovitaminosis A causes squamous metaplasia of epithelium within the oropharynx, choana, sinuses, GI tract, urogenital tract, reproductive tract, and uropygial gland, as well as hyperkeratosis of the feet.\n*[Paraphrased derived summary — non-Open-Access source.]* All-seed diets, and even mixed diets of 1/2 seeds and 1/2 pellets if not portion-controlled, are deficient in vitamin A.\n*[Paraphrased derived summary — non-Open-Access source.]* Seed-based diets are well known for their calcium:phosphorus imbalance and amino acid deficiencies.\n*[Paraphrased derived summary — non-Open-Access source.]* Sunflower seeds, which many psittacines preferentially select, are low in calcium, deficient in essential amino acids, and high in fat.\n*[Paraphrased derived summary — non-Open-Access source.]* High-fat diets (seeds, nuts, and many table foods), overabundance of food, and a sedentary lifestyle are contributing factors to illness.\n*[Paraphrased derived summary — non-Open-Access source.]* Iron storage disease is associated with excessive intake of dietary iron.\n*[Paraphrased derived summary — non-Open-Access source.]* Certain vitamin C-rich foods, such as citrus fruits, increase dietary iron uptake.\n*[Paraphrased derived summary — non-Open-Access source.]* Current dietary iron recommendations for toucans and mynahs are < 50-100 ppm.\n","sources":["exotic-pet-husbandry — Pet bird nutrition — all-seed diets deficient in vitamin A, Ca:P imbalance (retrieved 2026-07-29)"],"source":{"authority":"exotic-pet-husbandry","title":"Pet bird nutrition — all-seed diets deficient in vitamin A, Ca:P imbalance","url":"https://www.merckvetmanual.com/exotic-and-laboratory-animals/pet-birds","retrieved":"2026-07-29","ref":"","doc_type":"official PDF","source_document":"Merck Veterinary Manual (professional veterinary reference)","verification_file":"pdf-raw/exotic-toxicology/pet-bird.txt"},"source_document":"Merck Veterinary Manual (professional veterinary reference)","source_file":"pdf-raw/exotic-toxicology/pet-bird.txt","trust":{"authority_tier":"T3","fidelity":"paraphrase","license":"paraphrase","display_grade":"B"},"tokens_estimated":86,"generated_at":null,"tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}