Aflatoxicosis Aggressive mating Airborne toxin exposure Amyloidosis Angel wing Arthritis Aspergillosis Atherosclerosis Avian chlamydiosis Avian hematozoa Avian influenza Avian tuberculosis Blindness Blocked tear duct Blue-green algae toxicity Botulism Broken leg Bumblefoot Candidiasis Cataracts Choline deficiency Cloacitis (vent gleet) Conjunctivitis Contact dermatitis Derzsy's disease Duck plague Duck swollen head hemorrhagic disease Duck viral hepatitis (DVH) Egg binding Egg yolk peritonitis Ergotism Eye infection Eye injuries Fire ant attack Follicular cyst Foreign body ingestion Frostbite Gapeworm Giardiasis Gizzard worm infection Gout Head injuries Heat stress Hemangiomas and hemangiosarcomas Hernia Intestinal flukes Intracranial lipoma Keel injuries Lead poisoning Leech infestation Leucocytozoonosis Lice Lily of the valley poisoning Melanoma Mites Mycotoxicoses Myocarditis New duck disease Niacin deficiency Osteomyelitis Oviduct prolapse Pasteurellosis Peritonitis Photosensitization Preen gland infections Prolapsed phallus Renal tumors Respiratory infection Rodenticide (rat poison) toxicity Salmonellosis Salpingitis Sarcocystosis Septicemia Sialocele Slipped tendon Splay leg Staphylococcus infection Testicular tumors Thiamine Deficiency Toenail injuries Vitamin A deficiency Vitamin B6 deficiency Vitamin D deficiency West nile virus Wet feather Zinc toxicosis