Acorn toxicosis Aflatoxicosis Aggressive mating Airborne toxin exposure Amyloidosis Angel wing Arthritis Ascaridiasis Aspergillosis Avian chlamydiosis Avian hematozoa Avian influenza Avian tuberculosis Bill hematoma Blindness Blue-green algae toxicity Botulism Broken or bleeding toenail Bruise Bumblefoot Candidiasis Cataracts Choline deficiency Cloacitis (vent gleet) Conjunctivitis Contact dermatitis Cryptosporidiosis Derzsy's disease Duck haemorrhagic oophoritis (DHO) Duck plague Duck swollen head hemorrhagic disease Duck viral hepatitis (DVH) Egg binding Egg drop syndrome Ergotism Eye injuries Fire ant attack Follicular cyst Foreign body ingestion Fowl cholera Frostbite Gapeworm Gizzard worm infection Gout Head injury Heat stress Inactive or blocked oil gland Intestinal flukes Intracranial lipoma Keel injury Lead poisoning Leech infestation Leg Fracture Leucocytozoonosis Lice Lily of the Valley Poisoning Mites Mycotoxicoses Niacin deficiency Osteomyelitis Oviduct prolapse Peritonitis Photosensitization Prolapsed phallus Respiratory infection Riemerella anatipestifer Infection Salmonellosis Salpingitis Sialocele Slipped tendon Splay leg Staphylococcus infection Testosterone overload Vitamin A deficiency Vitamin B6 deficiency Vitamin D deficiency Wet feather Zinc toxicosis