Craving for unnatural articles of food; a depraved appetite. Expressed in animals by licking or eating foreign materials. Often caused by a nutritional deficiency of bulk, fiber or a specific nutrient, e.g. phosphorus, salt or copper. May lead to botulism, foreign body lodgement in mouth, pharynx, esophagus, in the reticulum to cause reticuloperitonitis, at the pylorus and, in the horse, in the small colon. Called also allotriophagia.




