Acorn toxicosis Aflatoxicosis Aggressive mating Airborne toxin exposure Amyloidosis Angel wing Arthritis Ascaridiasis Aspergillosis Avian chlamydiosis Avian cryptosporidiosis Avian hematozoa Avian influenza Avian tuberculosis Blindness Blocked tear duct Blue-green algae toxicity Botulism Broken leg Bruise 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 injury Fire ant attack Follicular cyst Foreign body ingestion Fowl cholera Frostbite Gapeworm Gizzard worm infection Gout Head injuries Heat stress Intestinal flukes Intracranial lipoma Keel injuries Lead poisoning Leech infestation Leucocytozoonosis Lice Lily of the valley poisoning Mites Mycotoxicoses Niacin deficiency Osteomyelitis Oviduct prolapse Peritonitis Photosensitization Preen gland infections Prolapsed phallus Respiratory infection Riemerella anatipestifer infection Rodenticide (rat poison) toxicity Salmonellosis Salpingitis Sialocele Slipped tendon Splay leg Staphylococcus infection Testosterone overload Toenail injuries Vitamin A deficiency Vitamin B6 deficiency Vitamin D deficiency Wet feather Zinc toxicosis