Acorn toxicosis Aflatoxicosis Aggressive mating Airborne toxin exposure Amyloidosis Anatipestifer infection Angel wing Arthritis Ascaridiasis 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 haemorrhagic oophoritis (DHO) Duck plague Duck swollen head hemorrhagic disease Duck viral hepatitis (DVH) Egg binding Egg drop syndrome Egg yolk peritonitis Ergotism Eye infection Eye injuries Fire ant attack Follicular cyst Foreign body ingestion Frostbite Gapeworm Gizzard worm infection Gout Head injuries Heat stress Hernia Intestinal flukes Intracranial lipoma Keel injuries Lead poisoning Leech infestation Leucocytozoonosis Lice Lily of the valley poisoning Mites Mycotoxicoses Niacin deficiency Osteomyelitis Oviduct prolapse Pasteurellosis Peritonitis Photosensitization Preen gland infections Prolapsed phallus Respiratory infection Rodenticide (rat poison) toxicity Salmonellosis Salpingitis Sialocele Slipped tendon Splay leg Staphylococcus infection Thiamine Deficiency Toenail injuries Vitamin A deficiency Vitamin B6 deficiency Vitamin D deficiency Wet feather Zinc toxicosis